O — The school dictionary · page 21 2 3 4 5officeAn office is a room or building where people work at desks, often with computers and papers.10 sentencesofficerAn officer is a police officer, a person whose job is to keep people safe and make them obey the law.11 sentencesofficialOfficial means approved by people in charge, like a government, school or organisation.12 sentencesofficiallyOfficially means in a way that is approved by people in charge, according to the rules or the law.10 sentencesofficiateTo officiate at a wedding, funeral or service is to lead it as a priest, minister or official.9 sentencesofficiousOfficious means too eager to give help or orders when nobody asked for them.5 sentencesoffshoreOffshore means in the sea, away from the coast.10 sentencesoffsideIn a position on the field that the rules don't allow, usually too far forward, ahead of the ball or the other team's last defender.8 sentencesoffspringOffspring are the young of an animal or plant: its babies or seeds.11 sentencesoftenOften means many times. If you often play, you play a lot.13 sentencesogreAn ogre is a huge, frightening giant in stories who eats people.5 sentencesogressAn ogress is a female ogre, a huge, frightening giantess in stories who eats people.5 sentencesoilA thick, slippery liquid that does not mix with water, from plants or animals, used in cooking: olive oil.13 sentencesoilbirdA brown, night-flying bird of South America and Trinidad that lives in caves, eats fruit and finds its way in the dark by clicking, a bit…7 sentencesoilyCovered with oil or containing a lot of oil: «oily hands», «oily fish».11 sentencesoinkAn oink is the grunting sound a pig makes.8 sentencesointmentA smooth, greasy cream rubbed on the skin to heal cuts, burns, rashes or sore places.9 sentencesoireachtasThe national parliament of Ireland, made of the President, the Dáil (lower house) and the Seanad (Senate).8 sentencesokAll right; acceptable; good enough: «Is it OK if I sit here?».12 sentencesokapiAn okapi is a shy African forest animal with a brown body and black-and-white stripes on its legs, like a zebra's.8 sentencesokayOkay means all right, fine, not hurt or not upset: are you okay?15 sentencesolaNot an English word on its own. It may be a piece of a longer word, as in "cola", "granola" or "Coca-Cola".10 sentencesoldOld tells how long someone or something has lived or been: «Tom is 7 years old».23 sentencesoldenOlden means belonging to the long-ago past; «in the olden days» means a long time ago.8 sentencesolderOlder means having lived more years than someone else.11 sentencesolfactionThe sense of smell, or the act of smelling.7 sentencesoliveAn olive is a small oval fruit, green or black, with a stone inside, that grows on olive trees and is eaten or pressed for oil.11 sentencesolmAn olm is a pale, blind salamander (an amphibian) that lives in dark underground cave waters in southern Europe, especially Slovenia and C…8 sentencesolympiadAn olympiad is a contest where pupils solve hard problems, for example in maths, physics or chess.10 sentencesolympianOlympian means belonging to the gods who lived on Mount Olympus in Greek stories.5 sentencesolympicOlympic means about the Olympic Games, the biggest international sports competition, held every four years in summer and winter versions.10 sentencesomegaOmega is the last letter of the Greek alphabet, written Ω or ω.10 sentencesomeletAn omelet is eggs beaten up and cooked flat in a pan, often with cheese or herbs.5 sentencesomeletteAn omelette is a dish of beaten eggs cooked flat in a frying pan, often folded over a filling such as cheese, ham or vegetables.7 sentencesomenA sign or event that some people believe shows that something good or bad will happen in the future.8 sentencesominousOminous means showing that something bad is about to happen; it is a warning sign.4 sentencesomissionSomething that has been left out or not done.9 sentencesomitTo leave something out, on purpose or by mistake.9 sentencesomnibusA book or TV programme that puts several stories or episodes together in one.10 sentencesomnivoreAn omnivore is an animal that eats both plants and other animals.9 sentencesonOn means touching the top or side of something: on the table, on the wall.25 sentencesonceOnce means one time.23 sentencesoncomingComing towards you or moving nearer: «oncoming traffic», «an oncoming storm».7 sentencesoneOne is the number 1, the first and smallest whole number above zero.28 sentencesoneidaA Native American people, one of the Six Nations of the Haudenosaunee (Iroquois Confederacy), from what is now New York State; also their…7 sentencesonionA round vegetable with layers, papery brown, red or white skin and a strong smell and taste, used in cooking.11 sentencesonlineConnected to the internet or done on it.12 sentencesonlookerAn onlooker is a person who watches something happen but does not take part, especially an accident, fight or event in the street.9 sentencesonlyOnly means no more than, or just one. «Only 3 are left» means just 3 are left.25 sentencesonomatopoeiaOnomatopoeia is when a word sounds like the noise it describes, such as buzz, bang, sizzle, hiss, splash, cuckoo and woof.10 sentencesonondagaA Native American people of central New York State, one of the Six Nations of the Haudenosaunee (Iroquois Confederacy); also their language.7 sentencesonsetThe onset of something is its start, especially of something bad or unpleasant.10 sentencesonshoreOn the land, not at sea, as in "onshore wind farms".9 sentencesonsideIn football, rugby and hockey, onside means in a position where you are allowed to play the ball; it is the opposite of offside.8 sentencesonslaughtAn onslaught is a fierce, sudden attack, when many people or things rush at once.4 sentencesonwardOnward means forward, going further on.12 sentencesoohOoh is a sound people make to show surprise, delight, interest or admiration.10 sentencesoolongA kind of Chinese tea, partly oxidised, between green tea and black tea in taste and colour.7 sentencesoozeverb (of a thick liquid) To flow out slowly: «Honey oozed from the jar».9 sentencesoozingOozing means slowly flowing or leaking out of something, like thick liquid.12 sentencesopalAn opal is a precious stone that shows flashing rainbow colours when you move it in the light.11 sentencesopaqueOpaque means light cannot pass through it, so you cannot see through it, like wood or a brick wall.9 sentencesopenTo open is to move something so you can go in or see inside: open a door, open a box.15 sentencesopenerAn opener is a tool for opening something, such as a tin opener, can opener or bottle opener.11 sentencesopeningAn opening is a gap or hole that something can pass through.14 sentencesopenlyOpenly means in a way that everyone can see or hear, not secretly.11 sentencesoperaAn opera is a play in which the actors sing almost all the words, with an orchestra playing music.12 sentencesoperateTo operate a machine is to make it work or control it.14 sentencesoperaticTo do with opera, plays where all or most of the words are sung, with an orchestra.8 sentencesoperatingWorking or running, said of a machine or business.11 sentencesoperationIn maths, an operation is a way of working with numbers: add, subtract, multiply or divide.11 sentencesoperativeWorking, in action: «The new system is now operative.».10 sentencesoperatorA person who works a machine or equipment: «a crane operator».10 sentencesopinionAn opinion is what you think or believe about something; it may not be the same as what others think.11 sentencesopiumA strong, illegal drug made from the juice of a kind of poppy, which makes people sleepy and is very addictive and dangerous.9 sentencesopossumAn opossum is a North and South American marsupial about the size of a cat, with a pointed white face, bare ears and a long, bare tail tha…8 sentencesopponentA person or team that you play, compete or fight against.10 sentencesopportunityAn opportunity is a time or situation when it is possible to do something you want or need to do; a chance.10 sentencesopposableAble to be placed opposite and pressed against the other fingers, like a human thumb, so that the hand can grip and pick things up.7 sentencesopposeTo oppose something is to be against it and try to stop it.12 sentencesopposedIf you are opposed to something, you are against it.12 sentencesopposingBeing against someone or something in a game, fight or argument (the opposing team).10 sentencesoppositeThe opposite is the thing that is as different as can be: up is the opposite of down.13 sentencesoppositionOpposition is strong disagreement with a plan or idea, often shown by speaking or acting against it.12 sentencesoppressTo oppress people is to treat them cruelly and unfairly, keeping them under hard control.4 sentencesoppressedTreated in a cruel and unfair way by people with power, and not given freedom or rights.11 sentencesoppressionOppression is cruel and unfair treatment of people, keeping them down and taking away their freedom.4 sentencesoppressiveCruel and unfair, keeping people down and taking away their freedom: an oppressive ruler.10 sentencesopticTo do with the eye or sight: «the optic nerve».12 sentencesopticalTo do with seeing and the eyes.8 sentencesopticianAn optician is a person whose job is to test people's eyes and make or sell glasses and contact lenses.9 sentencesoptimisticHopeful and believing good things will happen.9 sentencesoptionOne of the things you can choose from.12 sentencesoptionalSomething you can choose to do or have, but you do not have to.7 sentencesoptometristAn optometrist is a person trained to test people's eyesight, check eye health and prescribe glasses or contact lenses.7 sentencesorOr gives a choice between two or more things: tea or juice?21 sentencesoracleIn ancient Greece and Rome, a priest or priestess through whom people believed the gods gave advice or told the future, or the holy place…10 sentencesoracularOracular means like an oracle: giving wise-sounding answers or predictions that are often hard to understand.4 sentencesoralOral means spoken, not written: an oral test or an oral report is done by talking.11 sentencesorallyBy speaking, not in writing, as in "answer orally".9 sentences1 2 3 4 5This page in Markdown → https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/O/page/2/