Breadcrumb Home > Thesaurus > S Synonyms of sine Find synonyms for: Noun 1. sine, sin, trigonometric function, circular function usage: ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of sine (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: irascible Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language