FAIN Meaning of FAIN in English adj. & adv. archaic predic.adj. (foll. by to + infin.) 1 willing under the circumstances to. 2 left with no alternative but to. adv. gladly (esp. would fain). [ OE fgen f. Gmc ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012