Webster’s Revised Unabridged Dictionary · 1913
Aye
Aye, Ay, adv. [Perh. a modification of yea, or from the interjection of admiration or astonishment, OE. ei, ey, why, hey, ay, well, ah, ha. Cf. MHG. & G. ei, Dan. ej. Or perh. akin to aye ever.] Yes; yea; — a word expressing assent, or an affirmative answer to a question. It is much used in viva voce voting in legislative bodies, etc.
☞ This word is written I in the early editions of Shakespeare and other old writers.
Aye (äĭ), n. An affirmative vote; one who votes in the affirmative; as, "To call for the ayes and noes;" "The ayes have it."
Aye, Ay, adv. [Icel. ei, ey; akin to AS. ā, āwa, always, Goth. aiws an age, Icel. æfi, OHG, ēwa, L. aevum, Gr. ? an age, ?, ?, ever, always, G. je, Skr. ēva course. √4, 209. 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.