O
- orang noun (an orang, orangs); also a word in Malay
Short for orangutan, the large red-haired ape of Borneo and Sumatra. - orange noun (orange, oranges); adjective (orange)
An orange is a round, juicy fruit with a thick skin; it grows on a tree. - orangutan noun (an orangutan, orangutans)
1) An orangutan is a large, intelligent ape with long reddish-orange hair and very long arms, which lives in the rainforests of Borneo and… - oration noun (orations)
1) An oration is a formal speech, often given at a special ceremony such as a funeral. - orator noun (orators)
1) An orator is a person who is skilled at making speeches in public. - oratory noun (oratory — uncountable; an oratory, oratories)
The skill of giving powerful, good speeches in public. - orb noun (an orb, orbs)
An orb is a ball or round object, especially one that glows. - orbit noun (an orbit, orbits); verb (orbit, orbits, orbited, orbiting)
An orbit is the curved path of a planet, moon or satellite going around a star or planet. - orbital adjective (orbital); noun (an orbital, orbitals)
Orbital means to do with an orbit, the path of something going round a planet, star or moon. - orca noun (an orca, orcas)
1) An orca, also called a killer whale, is a large black-and-white sea mammal with a tall back fin; it is actually the biggest member of… - orchard noun (orchard, orchards)
1) An orchard is a piece of land with many fruit trees, like apple, pear, cherry or orange trees, often planted in rows. - orchestra noun (an orchestra, orchestras)
An orchestra is a large group of musicians who play many instruments together, such as violins, flutes, trumpets and drums. - orchestral adjective (orchestral)
1) To do with an orchestra or written for an orchestra, a large group of musicians playing strings, woodwind, brass and percussion together. - orchid noun (orchid, orchids)
1) An orchid is a beautiful flower with petals of unusual shapes; there are many thousands of kinds. 2) Orchid is also a pale purple color. - ordain verb (ordain, ordains, ordained, ordaining)
To ordain someone is to make them a priest, minister or rabbi in a special religious ceremony. - ordained verb past form (ordain, ordains, ordained, ordaining); adjective (ordained)
Ordained means made a priest, minister or religious leader in a special ceremony. - ordeal noun (an ordeal, ordeals)
A very hard, painful or frightening experience that goes on for some time. - order noun (order, orders); verb (order, orders, ordered, ordering)
Order is the way things follow one after another: in alphabetical order, in order of size. - orderly adjective (orderly); noun (an orderly, orderlies)
Orderly means tidy and well arranged: an orderly desk. - ordinal adjective (ordinal); noun (an ordinal, ordinals)
1) (maths) An ordinal number shows the place or position of something in order: first, second, third, fourth and so on. - ordinarily adverb (ordinarily)
1) Usually; in the normal way: Ordinarily, I walk to school. 2) In an ordinary, not special, way (less common). - ordinary adjective; noun (out of the ordinary)
1) Ordinary means normal, usual or plain; not special or different. 2) «Out of the ordinary» means unusual or surprising. - ordinate noun (an ordinate, ordinates)
1) (maths) The y-coordinate of a point on a graph: how far up or down the point is from the x-axis. - ordination noun (ordination, ordinations)
Ordination is the ceremony in which a person is made a priest, minister, deacon or rabbi, usually by a bishop or other leader. - ordnance noun (ordnance, uncountable)
Military weapons, especially large guns, bombs, shells and ammunition. - ore noun (ore, ores)
1) Ore is rock or earth that has a useful metal in it, like iron or copper, which people dig up and take the metal out of. - organ noun (an organ, organs)
A part of the body that has a special job, like the heart, lungs, brain, stomach or skin. - organic adjective (organic; organically — adverb)
Organic food is grown or raised without man-made chemicals such as artificial pesticides and fertilisers. - organisation noun (an organisation, organisations; organisation, uncountable)
An organisation is a group of people who work together for a purpose, such as a charity, club, company or school. - organise verb (organise, organises, organised, organising; US organize)
To organise something is to plan and arrange it: organise a party, a trip or a game. - organised adjective (organised, more organised, most organised); also the past form of the verb organise (organise, organises, organised, organising)
Organised means tidy and well planned, so things are where they should be and done on time. - organiser noun (an organiser, organisers; US organizer)
A person who plans and arranges an event or activity, like a party, a trip or a sports day. - organism noun (an organism, organisms)
1) Any living thing, such as an animal, plant, fungus or bacterium. 2) A whole system with parts that work together like a living thing. - organization noun (an organization, organizations; organization — uncountable)
A group of people who work together for a purpose, such as a charity, a club, a company or a school. - organized verb past and past participle (organize, organizes, organized, organizing); adjective (organized, more organized)
Organized means put in a neat order, or sorted into groups. - orient verb (orient, orients, oriented, orienting); noun (the Orient)
To find out or work out where you are or which way you are facing, as in "orient yourself with a map". - oriental adjective (oriental; Oriental); noun (an Oriental — old-fashioned, offensive)
From or to do with the countries of East Asia, like China, Japan and Korea. - orientation noun (orientation, orientations; an orientation)
The direction something faces or points: north, south, up, sideways. - oriented adjective (oriented, -oriented); verb past form (orient → oriented; UK also orientated)
Oriented means pointed or turned in a certain direction. - origami noun (origami — uncountable)
1) The Japanese art of folding paper into shapes like birds, animals and boxes, usually without cutting or glue. - origin noun (an origin, origins)
The origin of something is where or how it began. - original adjective (original); noun (an original, originals)
First; existing at the beginning, before changes: «the original plan». - originality noun (no plural)
1) Originality is being new and different, not copied from others. - originally adverb (from «original»)
At first; in the beginning, before something changed. - originate verb (originate, originates, originated, originating)
1) To begin or come from a place, time or source (the game originated in Scotland). 2) (formal) To invent or start something new. - originator noun (an originator, originators)
1) The originator of something is the person who first thought of it, made it or started it. - ornament noun (an ornament, ornaments); verb (ornament, ornaments, ornamented, ornamenting)
An ornament is a small object used to make a room, a shelf or a Christmas tree look nice, rather than for a practical use. - ornamental adjective (ornamental)
1) Ornamental means used to decorate and make something look nice, rather than for a practical use. - orphan noun (an orphan, orphans); verb (orphan, orphans, orphaned, orphaning — usually passive)
An orphan is a child whose parents have both died. - orphanage noun (orphanages)
1) An orphanage is a home where children who have no parents live and are cared for. - orthodontist noun (an orthodontist, orthodontists)
1) A dentist who specialises in straightening teeth and fixing the way teeth and jaws fit together, often by fitting braces. - orthodox adjective (orthodox, more orthodox); Orthodox (church, Jewish)
Orthodox means following the usual, accepted ideas or ways of doing something. - orthography noun (orthography; orthographies)
1) Orthography is the system of spelling and writing a language: which letters stand for which sounds, and rules for capital letters… - orthoptist noun (an orthoptist, orthoptists)
1) A health professional who checks and treats problems with how the eyes move and work together, such as a squint or a lazy eye. - oryx noun (an oryx, oryx or oryxes)
1) An oryx is a large antelope of the deserts and dry grasslands of Africa and Arabia, with very long, straight, pointed horns and a pale… - os noun (os, ossa — Latin); abbreviation (OS); fragment
OS is short for "operating system", the main program that runs a computer or phone, like Windows, macOS, Android or iOS. - oscar noun, name (an Oscar, Oscars; Oscar — a boy's name)
An Oscar is a gold statue given each year as a top prize for films, also called an Academy Award. - oscillate verb (oscillate, oscillates, oscillated, oscillating)
To swing or move back and forth regularly, like a pendulum. - oscillating verb form (present participle of oscillate: oscillate, oscillates, oscillated, oscillating); adjective (oscillating)
1) Swinging or moving back and forth regularly. 2) (adjective) Moving or turning from side to side, as in "an oscillating fan". 3)… - oscillation noun (an oscillation, oscillations; also uncountable)
A regular movement back and forth, like a pendulum swing. - osier noun (an osier, osiers)
A kind of willow tree or bush that grows by rivers and wet ground, with long thin bendy shoots. - osprey noun (an osprey, ospreys)
1) An osprey is a large bird of prey with brown wings and a white underside that dives feet-first into water to catch fish. - ossified adjective (ossified); also the past form of the verb ossify (ossify, ossifies, ossified, ossifying)
Ossified means turned into bone: soft cartilage that has hardened into bone, as happens in a growing child's skeleton. - ostentation noun (no plural)
1) Ostentation is showing off to be noticed, with too much display of wealth or fine things. - ostler noun (ostlers)
1) (old use) An ostler is a man who looked after horses at an inn in the old days. - ostracise verb (ostracise, ostracises, ostracised, ostracising)
1) To leave someone out of a group on purpose and refuse to talk to them or include them. - ostracism noun (ostracism, uncountable)
Leaving someone out on purpose, so they are not included by a group. - ostrich noun (ostrich, ostriches)
An ostrich is a very large bird from Africa that cannot fly but runs very fast on its long, strong legs. - other adjective (other); pronoun (other, others); determiner (other)
1) Other means a different one, not this one. 2) «The other» or «the others» means the rest: «The other children» are the rest of the… - otherwise adverb (otherwise); also a joining word (= or else)
Otherwise means «if not» or «or else»: what will happen if something is not done. - otoscope noun (an otoscope, otoscopes)
1) An otoscope is a small medical tool with a light and a magnifying lens that a doctor uses to look inside your ear. - ottawa noun, proper (Ottawa — with a capital letter)
Ottawa: the capital city of Canada, in the province of Ontario, on the Ottawa River. - otter noun (otter, otters)
1) An otter is a playful animal with smooth brown fur, short legs, webbed feet and a long tail that lives near rivers or the sea and swims… - ottoman noun (an ottoman, ottomans — furniture; the Ottomans); adjective (Ottoman)
1) (history) The Ottoman Empire was a large, long-lasting empire ruled by Turkish sultans from Istanbul, covering Turkey and lands in… - ounce noun (ounces)
An ounce is a small unit of weight; there are 16 ounces in a pound, and an ounce is about 28 grams. - ousel noun (ousel, ousels) (old use)
An ousel is an old word for a dark bird of the thrush family, such as a blackbird. - oust verb (oust, ousts, ousted, ousting)
To oust someone is to force them out of a place, job or position so that they lose it. - out adverb, preposition (out; out of); adjective (out); verb (out, outed — to tell others a secret about someone)
1) Out means away from the inside of something. 2) Out means not at home or not in a place. 3) Out means used up, finished or not working… - outback noun (the outback)
1) The outback is the huge, dry, mostly empty land far inland in Australia, far away from the cities and the coast. - outbreak noun (an outbreak, outbreaks)
An outbreak is the sudden start of something bad, such as a disease, a war or violence. - outburst noun (outburst, outbursts)
An outburst is a sudden strong show of feeling, such as anger or laughter, that bursts out. - outcast noun (an outcast, outcasts); adjective (outcast)
1) An outcast is a person who is not accepted by other people and is pushed out of a group or society. - outcome noun (an outcome, outcomes)
An outcome is the result of something, what happens in the end. - outcrop noun (an outcrop, outcrops)
1) A part of rock that sticks out of the ground or a hillside. 2) A small group of something appearing in an unexpected place. - outcry noun (outcry, outcries)
An outcry is a loud shout of protest, anger or alarm, often from many people together. - outdated adjective (outdated, more outdated)
Old-fashioned; no longer used or useful because something newer exists. - outdo verb (outdo, outdoes, outdid, outdone, outdoing)
To outdo someone is to do better than them, to beat them at something. - outdoor adjective (outdoor: outdoor games); related adverb (outdoors)
1) Outdoor describes things that happen, are used or are found outside, not inside a building, like outdoor games or an outdoor pool. - outdoors adverb (outdoors); noun (the outdoors); adjective (outdoor)
1) Outdoors means outside, not in a building. 2) The outdoors is the natural world away from buildings: fields, woods, mountains, beaches. - outer adjective (outer)
Outer means on the outside, the part farthest from the middle. - outfit noun (an outfit, outfits); verb (outfit, outfits, outfitted, outfitting)
1) An outfit is a set of clothes worn together. 2) An outfit is a costume for a special event. 3) Informally, an outfit is a group, team… - outflow noun (an outflow, outflows; also uncountable); verb (outflow — rare)
Water, air or another substance flowing out of a place. - outhouse noun (outhouse, outhouses)
An outhouse is a small building outside a main house, such as a shed or a store. - outing noun (an outing, outings)
A short trip out for fun, often with a group, such as a class going to a zoo or museum. - outlandish adjective
Outlandish means strange and odd, unlike what is usual, often from a far-off foreign land. - outlast verb (outlast, outlasts, outlasted, outlasting)
To last longer than something else: to keep going or keep working after the other has stopped. - outlaw noun (an outlaw, outlaws); verb (outlaw, outlaws, outlawed, outlawing)
A person who has broken the law and is running away from it, especially in old stories. - outlet noun (an outlet, outlets)
An outlet is a way for something, such as water or gas, to get out. - outline noun (an outline, outlines); verb (outline, outlines, outlined, outlining)
An outline is a line that shows the shape or edge of something. - outlive verb (outlive, outlives, outlived, outliving)
1) To live longer than someone else. 2) To last longer than something, or to keep going after it has stopped being useful: «The rule has…
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