To expand is to increase the extent or dimensions of something, as when a balloon expands when you blow air into it.

EXPAND definition: 1. to increase in size, number, or importance, or to make something increase in this way: 2. to…. Learn more.

Jan 20, 2026 · Verb expand (third-person singular simple present expands, present participle expanding, simple past and past participle expanded) (transitive) To change (something) from a smaller form or …

To expand is to spread out, usually in every direction: to expand one's chest. To dilate is esp. to increase the width or circumference, and applies to space enclosed within confines or to hollow …

1. To become greater in size, volume, quantity, or scope: Air expands when heated. This critic's influence is expanding. 2. To speak or write at length or in detail: expand on a favorite topic. 3. To …

Definition of expand verb in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

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

expand, amplify, swell, distend, inflate, dilate mean to increase in size or volume. expand may apply regardless of the manner of increase (such as growth, unfolding, addition of parts).

She declined to expand on her earlier statement. Please expand [= elaborate] on that idea. Researchers will expand upon their data in a new study.

To expand is to spread out, usually in every direction: to expand one's chest. To dilate is esp. to increase the width or circumference, and applies to space enclosed within confines or to hollow …