supposition.

An idea treated as possible or true for the sake of thinking or argument, though not established as fact.

Use it for

Words that belong together

• on the supposition that
• unsupported supposition

On the page

The analysis began on the supposition that the records were complete.

A supposition about motive is not evidence of the act itself.

Usage notes

Primary category: academic. Forms: Singular supposition; plural suppositions. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.