Main Entry: sup·po·si·tion

Pronunciation: \ˌsə-pə-ˈzi-shən\

Function: noun

Etymology: Middle English supposicioun, from Anglo-French supposicion, from Late Latin supposition-, suppositio, from Latin, act of placing beneath, from supponere

Date: 15th century

1 : something that is supposed : hypothesis
2 : the act of supposing

— sup·po·si·tion·al \-ˈzish-nəl, -ˈzi-shə-n^əl\ adjective