Definition of "euphonium" [eu•pho•ni•um]

• A brass wind instrument similar to the tuba but having a somewhat higher pitch and a mellower sound. (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.

• "Rocking Carol, once given a bonkers electronic treatment by New Order, is warmly rendered with horns and euphonium."
• "Christa was able to stretch our donated money to the limit and so we were able to purchase 11 new instruments including three trumpets, a pocket trumpet, a tuba, alto and baritone horn, a trombone, euphonium, a snare and a base drum."
• "Mr. Koster's touring companions this year include Robbie Cucchiaro , 37, and Ian Ludders , 33, fellow Music Tapes bandmates who play a share of idiosyncratic instruments—trombone, euphonium, toy piano—between them."