What does suppose mean?
“Suppose” means to think, believe, or assume that something is the case, usually with some uncertainty. It is commonly used in two broad ways: to state a tentative belief, as in “I suppose she is still working,” and to introduce a hypothetical situation, as in “Suppose we took a different route.” The word can also express a proposal or recommendation, such as “Suppose we begin with the easier section.” In conversation, “I suppose” often communicates a provisional opinion, mild surprise, or reluctant acceptance rather than strong certainty. Because “suppose” combines the practical language of assumption with a broader sense of considering possibilities, it is useful whenever a speaker wants to test an idea, propose an alternative, or qualify a claim without asserting it as fact.
To think, believe, or assume something to be true, often tentatively.
"I suppose she knows about the change."
The phrase “I suppose” is informal and conversational; it can indicate uncertainty, concession, or mild surprise.
To consider a hypothetical situation or possibility.
"Suppose the weather improved; would you travel?"
This use often appears with “that,” a clause beginning with a subject and verb, or an imperative construction such as “let’s suppose.”
To mean or intend something, or to propose something as a possibility.
"You are not suggesting that we cancel the meeting?"
This use can be tentative or mildly challenging, depending on tone.
“Suppose” is a small word for opening a door to possibility: it invites you to imagine a situation before deciding what to do about it.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does suppose come from?
The word comes through Old French supposer, from Latin supposere, meaning “to put under” or “to assume.” Latin supposere was formed from the prefix sub- and the verb ponere, “to place or put.” The modern English verb developed from its earlier sense of assuming or supposing something and later broadened to include introducing hypothetical situations.
Related word forms
How suppose is actually used
In everyday English, “suppose” is often softer than “know” or “believe” and may suggest a tentative judgment rather than firm conviction. “I suppose” can also convey resignation or mild surprise, depending on context.
Easily confused with suppose
Both can mean to take something as true, but “assume” often implies accepting something as the basis for an action or conclusion, whereas “suppose” more often presents a possibility or hypothetical.