expansion

«expansion» in Mova's school dictionary: Getting bigger in size, amount or space — its meaning for a pupil, its sense in the lessons and examples, with 1 sentence of Mova's corpora that use it.

part of speech

noun (expansion, expansions; usually uncountable)

meaning for a pupil

1) Getting bigger in size, amount or space. tree →

2) (science) The way a material takes up more space when it gets warmer. tree →

3) The growth of a business, a town or an empire into new places. tree →

4) (maths) Writing a number or an expression out in a longer form, such as 345 = 300 + 40 + 5. tree →

sense in the lessons

In science it describes heat making solids, liquids and gases expand: railway tracks have gaps for expansion. In maths «expanded form» or «expansion» means writing a number as a sum of its place values, or multiplying out brackets. In history and business it means growing into new lands or markets. Phrases: rapid expansion, expansion of the town, thermal expansion.

examples

• The expansion of the balloon showed that the air inside was getting warmer. tree →
• Bridges have small gaps to allow for expansion on hot days. tree →
• The expansion of the school means we will get a new library. tree →
• Write 4,562 in expanded form: 4,000 + 500 + 60 + 2. tree →
• The company's expansion brought new jobs to the town. tree →
• The Roman Empire's expansion covered many lands. tree →
• Water's expansion when it freezes can crack a pipe. tree →

note

Verb: expand; adjective: expansive (wide, open, or friendly and chatty). The opposite is contraction. Spelling: -sion, not -tion. In maths, expansion does not change the value: 345 and 300 + 40 + 5 are equal.

In the corpora

• Bridges grow longer in heat and shorter in cold, and expansion joints, metal teeth or gaps, let them move.

Trees and pragmatics

Every meaning and example of «expansion» parsed by Mova, each sentence with its dependency tree and frames.