supposition noun

ADJ. mere, pure That is mere supposition! | reasonable It is a reasonable supposition that many mothers would welcome the offer of part-time work.

VERB + SUPPOSITION make, work on Let's work on the supposition that she meant no offence. | be based on | confirm, support | be correct in You are correct in your suppositions about the source of his wealth.

SUPPOSITION + VERB be based on sth

PREP. on (a/the) ~ She was charged on the supposition that she had colluded with her husband in the murders. | ~ about They are making all sorts of suppositions about our possible reaction. | ~ of a supposition of innocence