I. ˈpər-əd-ˌven-chər, ˈper-; ˌpər-əd-ˈ, ˌper- adverb
Etymology: Middle English par aventure, from Anglo-French, by chance
Date: 14th century
archaic : perhaps , possibly
II. noun
Date: 1627
1. : doubt
a fact established beyond peradventure
2. : chance 4a
beyond peradventure of doubt