Aye \Aye\, Ay \Ay\, adv. [Icel. ei, ey; akin to AS. [=a], [=a]wa, always, Goth. aiws an age, Icel. [ae]fi, OHG, ?wa, L. aevum, Gr. ? an age, ?, ?, ever, always, G. je, Skr. ?va course. ?,?. Cf. {Age}, v., {Either}, a., {Or}, conj.] Always; ever; continually; for an indefinite time. For his mercies aye endure. --Milton. {For aye}, {always}; forever; eternally.