Breadcrumb Home > Thesaurus > G Synonyms of gnat Find synonyms for: Noun 1. gnat, dipterous insect, two-winged insects, dipteran, dipteron usage: any of various small biting flies: midges; biting midges; black flies; sand flies 2. gnat, mosquito usage: (British usage) mosquito WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of gnat (Dictionary) ✖ Related Content Daily Word Quiz: criticaster Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language