Antonyms of noun expansion

1 of 4 senses of expansion

Sense 1
expansion, enlargement -- (the act of increasing (something) in size or volume or quantity or scope)
       Antonym of contraction (Sense 4)
      => contraction -- (the act of decreasing (something) in size or volume or quantity or scope)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun expansion

4 senses of expansion

Sense 1
expansion, enlargement -- (the act of increasing (something) in size or volume or quantity or scope)
       => increase, step-up -- (the act of increasing something; "he gave me an increase in salary")

Sense 2
expansion -- (a function expressed as a sum or product of terms; "the expansion of (a+b)^2 is a^2 + 2ab + b^2")
       => function, mathematical function, single-valued function, map, mapping -- ((mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function))

Sense 3
expansion, enlargement, elaboration -- (a discussion that provides additional information)
       => discussion, treatment, discourse -- (an extended communication (often interactive) dealing with some particular topic; "the book contains an excellent discussion of modal logic"; "his treatment of the race question is badly biased")

Sense 4
expansion, expanding upon -- (adding information or detail)
       => increase, step-up -- (the act of increasing something; "he gave me an increase in salary")