The meaning of EXPANSION is expanse. How to use expansion in a sentence.

EXPANSION meaning: 1 : the act of becoming bigger or of making something bigger the act of expanding; 2 : a more complete and detailed written work or set of comments based on …

EXPANSION definition: 1. the increase of something in size, number, or importance: 2. the increase of something in size…. Learn more.

Definition of expansion noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

1. the act or process of expanding. 2. the state or quality of being expanded. 3. the amount or degree of expanding. 4. an expanded portion or form of a thing.

The runway is undergoing expansion to allow bigger planes to land there. [countable] an expanded portion or form of a thing: The book is an expansion of a series of articles.

Expansion is the process of becoming greater in size, number, or amount. ...the rapid expansion of private health insurance.

Oct 31, 2025 · expansion (countable and uncountable, plural expansions) The expansion of metals and plastics in response to heat is well understood. Look up the expansion of 1018 …

Definition of expansion. English dictionary and integrated thesaurus for learners, writers, teachers, and students with advanced, intermediate, and beginner levels.

Expansion is usually due to heating. When substances are heated, the molecular bonds between their particles are weakened, and the particles move faster, causing the substance to expand.