/ Dictionary / Index A aye-aye: Meaning and Definition of Find definitions for: aye-aye Pronunciation: (ī'ī"), [key] — n. a nocturnal lemur, Daubentonia madagascariensis, of Madagascar, feeding on insects and fruit, and having rodentlike incisors and long fingers: an endangered species. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aye-aye (Thesaurus) aye Ayer Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language