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Definition of assume

assume

/əˈsuːm/
as · sume

Adverb:assumptively
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Adjective:assumptive
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Past Simple:assumed
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Past Participle:assumed
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Present Participle:assuming
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assume Lexical Profile

assume Game Scores & Validity

• verb

1

To suppose to be the case without proof or explicit confirmation.

Example

"It is reasonable to assume that the flight will be delayed due to the heavy snowstorm."


2

To take or begin to have responsibility, power, control, or an official position.

Example

"The newly elected governor will formally assume office on the first day of January."


3

To begin to have or exhibit a specified quality, appearance, or extent.

Example

"As the negotiations progressed, the dispute began to assume international significance."


4

To pretend to have or feel an emotion, attitude, or identity in order to deceive others.

Example

"The fugitive traveled across the border under an assumed name to evade the authorities."

Synonyms
View all synonyms for assume
Antonyms
View all antonyms for assume

Word Nuance & Usage

While often used interchangeably with "presume," "assume" implies accepting something as true without any proof or evidence, whereas "presume" suggests taking something as true based on reasonable probability or strong evidence.

• Rhymes for assume

Word Origin & Etymology

Borrowed in the early 15th century from Latin assumere, meaning "to take up" or "to adopt," formed from the assimilated prefix ad- ("to, toward") and sumere ("to take").

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Assume. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/assume
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