assume

/əˈsjuːm/ · uh-SOOMverb

Accept or suppose that something is true without proof, often as a basis for reasoning.

Use assume to express this relationship precisely: accept or suppose that something is true without proof, often as a basis for reasoning.

What assume Really Means

The word becomes easier to use when its closely related senses are separated and compared.

1

Core action

Accept or suppose that something is true without proof, often as a basis for reasoning.

Example

The model assumes that prices remain constant.

2

Common construction

Use this expression in its normal grammatical frame so the relationship between the surrounding ideas remains explicit.

Example

We should not assume the anonymous account is accurate.

3

Reasoning effect

It tells the reader how to interpret the timing, scope, evidence, contrast, condition, or consequence in the statement.

Example

For comparison, researchers assumed both samples had the same density.

Use assume Naturally

Notice how the surrounding noun or clause reveals the exact shade of meaning.

The model assumes that prices remain constant.

We should not assume the anonymous account is accurate.

For comparison, researchers assumed both samples had the same density.

Precision Matters

Assume overlaps with several common words, but each carries a different emphasis.

assume

Means accept or suppose that something is true without proof, often as a basis for reasoning.

vs.
ascertain

Means find out or establish a fact with certainty through investigation, observation, or evidence.

assume

Means accept or suppose that something is true without proof, often as a basis for reasoning.

vs.
corroborate

Means confirm or support a statement with additional evidence.

assume

Means accept or suppose that something is true without proof, often as a basis for reasoning.

vs.
debunk

Means expose or prove a belief, claim, theory, or story to be false or exaggerated.

assume

Means accept or suppose that something is true without proof, often as a basis for reasoning.

vs.
presupposition

Means an assumption taken for granted in advance and treated as a basis for reasoning or discussion.

Test assume in Context

The estimate accepts an unproved premise as a basis for calculation.

1

Because no measurement was available, the estimate had to ___ that the population remained stable.

Prepared byFirst Academy
Editorial responsibilityFirst Academy Academic Team
Updated3 August 2026
Selection and reviewRead our methodology