A large, valved, brass wind instrument with a bass pitch.(noun)
A reed stop in an organ, having eight-foot pitch.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "tuba" in a sentence
"In the interest of alcoholic comprehensiveness, "tuba" is also the Philippine name for fermented palm tree sap, which can either be made into a wine-like beverage or soured into vinegar."
"A cursed tuba from the Titanic is this episode’s Maguffin, plus Roxy and her succubi return."
"A tuba is a weak, puny thing fit only for mewling, puking babes and Guy Lombardo -- the better to harass balding, middle-aged dancers."