Breadcrumb Home > Thesaurus > F Synonyms of fifo Find synonyms for: Noun 1. first in first out, FIFO, inventory accounting usage: inventory accounting in which the oldest items (those first acquired) are assumed to be the first sold WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of fifo (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: eponymous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language