Entry 2 senses · 2 variants Webster, 1913 Peradventure · Per·ad·ven·ture · IPA adv. & conj. n. 01 adv. & conj. By chance; perhaps; it may be; if; supposing. 1. By chance; perhaps; it may be; if; supposing. “Peradventure there be fifty righteous within the city.” — Gen. xviii. 24. 02 n. Chance; hap; hence, doubt; question; as, proved beyond peradventure. 1. Chance; hap; hence, doubt; question; as, proved beyond peradventure.