/ Thesaurus / D Synonyms of double flat Find synonyms for: Noun1. double flat, flatusage: a musical notation of two flats in front of a note indicating that it is to be lowered by two semitonesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language