Ay interj. Ah! alas! “Ay me! I fondly dream ‘Had ye been there.'”
  Aye, Ay  adv.  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.
  Note: ☞ This word is written I in the early editions of Shakespeare and other old writers.
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  Aye, Ay  adv.  Always; ever; continually; for an indefinite time.
     For his mercies aye endure.   --Milton.
  For aye, always; forever; eternally.
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