Breadcrumb Home > Thesaurus > B Synonyms of btu Find synonyms for: Noun 1. British thermal unit, BTU, B.Th.U., work unit, heat unit, energy unit usage: a unit of heat equal to the amount of heat required to raise one pound of water one degree Fahrenheit at one atmosphere pressure; equivalent to 251.997 calories WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of btu (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: spelunk Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language