/ Dictionary / Index G guano: Meaning and Definition of Find definitions for: gua•no Pronunciation: (gwä'nō), [key] — n. a natural manure composed chiefly of the excrement of sea birds, found esp. on islands near the Peruvian coast. any similar substance, as an artificial fertilizer made from fish. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: guano (Thesaurus) guanine deaminase guanosine Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language