FOISON Meaning of FOISON in English [foi.son] n [ME foisoun, fr. MF foison, fr. L fusion-, fusio pouring, effusion--more at fusion] (14c) 1 archaic: rich harvest 2. chiefly Scot: physical energy or strength 3 pl, obs: resources Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012