expansion

noun ex·pan·sion \ ik-ˈspan(t)-shən \

Definition of expansion

1 :expanse
2 :the act or process of expanding
  • territorial expansion
  • economic expansion
  • expansion of the universe
3 :the quality or state of being expanded
4 :the increase in volume of working fluid (such as steam) in an engine cylinder after cutoff or in an internal combustion engine after explosion
5 a :an expanded part
b :something that results from an act of expanding
  • the book is an expansion of a lecture series
6 :the result of carrying out an indicated mathematical operation :the expression of a function in the form of a series

expansional

play \ik-ˈspanch-nəl, -ˈspan(t)-shə-nᵊl\ adjective

Examples of expansion in a Sentence

  1. The league is undergoing expansion.

  2. the expansion of a lecture series into a book

  3. This book is an expansion of a lecture series.

Recent Examples of expansion from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'expansion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of expansion

1611


EXPANSION Defined for English Language Learners

expansion

noun

Definition of expansion for English Language Learners

  • : the act of becoming bigger or of making something bigger : the act of expanding

  • : a more complete and detailed written work or set of comments based on something shorter


EXPANSION Defined for Kids

expansion

noun ex·pan·sion \ ik-ˈspan-shən \

Definition of expansion for Students

:the act of growing or increasing :enlargement

Medical Dictionary

expansion

noun ex·pan·sion \ ik-ˈspan-chən \

medical Definition of expansion

1 :the act or process of expanding
2 :the quality or state of being expanded


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