Definition of expansion in English:

expansion

Line breaks: ex¦pan|sion
Pronunciation: /ɪkˈspanʃ(ə)n
 
, ɛk-/

noun

[mass noun]
  • 1The action of becoming larger or more extensive: the rapid expansion of suburban London [count noun]: a small expansion of industry
    More example sentences
    • Much of the rest of the country is paying the price of rapid economic expansion.
    • At the same time close links with the USA resulted in rapid economic recovery and expansion.
    • These years are post-integration and are from a period of rapid expansion of the industry.
    Synonyms
  • 1.1The political strategy of extending a state’s territory by encroaching on that of other nations: German expansion in the 1930s
    More example sentences
    • It adopted a defensive strategy, recognizing that expansion of territory is costly in men and material.
    • We are currently laying plans for the establishment and territorial expansion of our nation.
    • Political instability and danger for the further expansion of the European Union are threatened.
  • 1.2 [count noun] A thing formed by the enlargement or broadening of something: the book is an expansion of a lecture given last year
    More example sentences
    • This value signifies that the colony contains 37,800 sectors of cells having tract length expansions.
    • In a sense, this is an expansion of that book to cover the whole region.
    • ‘I think the ballparks are smaller, the players are stronger, and we've had two expansions in the last decade,’ said Selig.
    Synonyms
    elaboration, enlargement, amplification, development; embellishment
  • 1.3The increase in the volume of fuel on combustion in the cylinder of an engine, or the piston stroke in which this occurs.
    More example sentences
    • If the operating temperature is higher than there is greater heat distortion due to thermal expansion hence increased friction.

Origin

early 17th century: from late Latin expansio(n-), from Latin expandere (see expand).

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