Breadcrumb Home > Thesaurus > C Synonyms of cusp Find synonyms for: Noun 1. cusp, point usage: point formed by two intersecting arcs (as from the intrados of a Gothic arch) 2. cusp, leaflet, flap usage: a thin triangular flap of a heart valve 3. cusp, point, tip, peak usage: small elevation on the grinding surface of a tooth WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of cusp (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: troglodyte Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language