A euphemism or innuendo relating to people who play in the lower brass section of the orchestra.

Applies solely to people who play the trombone, euphonium, baritone and tuba.
Girl: I like your tuba, is it full sized?
Boy: Gosh, that's a real euphoniumism!
by Nopseudonymisgoodenoughforme February 14, 2011
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A mysterious instruments played by the select few. It is the most important instrument of the low brass. The players get sick and tired of people asking what a Euphonium is, and most likely didn't tell you. That is why you are on Urban Dictionary.
Guy 1: What's a Euphonium?
Euphonium Player: *face palm*
by A Euph Player February 23, 2011
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a low brass instrument with 3 or 4 valves that can be played in treble or bass clef. hardly anybody knows what it is so euphonium players often get tired of explaining it. they are usually the least ignorant section in low brass and the smallest and most talented section in the band.
band director: can someone please explain the coda to the trombones!?
euphonium section: we can! we can!
by honorband71 July 3, 2010
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n. a large 3- or 4-valved brass instrument resembling a small tuba; it is similar to the baritone horn but, while the baritone has a cylindrical (straight) bore, the euphonium has a conical (grows larger as it progresses towards the bell) bore, warming up the sound
The euphonium has a dark, rich sound--except when too much garbage has been dropped down the bell.
by Civil Twilight 646 July 21, 2003
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The single most important instrument in the low brass section of a band. The players are often anal about the performance of other band members epically trumpets, and they are often the best players in the band.
Band Director: Thank you Euphonium's for an exceptional performance.
Euphonium player: It would have been better but the trumpets egos got in the way!
by euphsrock October 10, 2007
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A low brass instrument also referred to as a baritone. Comes from the word euphonic, meaning good sound. The single most awesome instrument in the world, if not simply for the name. Most people don't know what it is and ask in their peasantish ignorance. These people should be smacked.
What the hell is that man?
It's a Euphonium biatch! SMACK
OW!
by chez man October 14, 2005
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Mosty definitely the most admired instrument in the band. The euphonium is a precious part of the symphonic band, as is the baritone to the marching band, because it provides a rich, dark sound to sustain the bottom of the band. This is the sounds that all other band members envy. These instruments, with the assistance of the rest of the low brass, give the band the edge needed to win superiors. Plain and simple, euphoniums rule!
"Wow! Did you hear that Euphonium solo? It was spectacular!"
by JewC June 2, 2008
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