/ Dictionary / Index F FIFO: Meaning and Definition of Find definitions for: FIFO Pronunciation: (fī'fō), [key] — n. See a storage and retrieval technique, used mainly for data, in which the first item stored is also the first item retrieved. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fifo (Thesaurus) fife rail fifteen Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language