Words / B2

uh-SYOOM/əˈsjuːm/

To assume is to treat something as true without checking — weaker than know, which needs evidence. Common patterns are assume that + clause and assume someone to be + adjective; a second, more formal meaning is take on a role (assume responsibility). In conversation it can sound unfair if you assume someone's motives.

Meaning

To believe something is true without proof.

Examples

• “I assumed she was at work, but she was at home.”
• “Do not assume the email arrived; check your spam folder.”
• “We assumed the shop would still be open.”

Good to know

assume that + clause. Contrast: know (with evidence). Also: assume responsibility.

Near in meaning

suppose

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