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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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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what sex would be if it was an instrument. in a high school band the

Euphonium players are to cool to practice, but cause they play the Euphonium it sounds like sex.

person #1 "wow that song they just played sounds like sex"

person #2 "yea cause the Euphonium section is playing every part"
by divine maddog January 25, 2009
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1. (Noun) A Low Brass instrument that is commonly mistaken for a baritone. Although it plays very similar to a baritone; it's major difference being the conical bore. Euphoniums play in either bass clef or tenor clef, provided the player can read. In regards to the Low Brass section, they tend to be loners within the section. Very similar to mellophone and french horn players in High Brass. Euphoniums are high quality instruments, most times, played by musicians that are versed with several instrumnts.

Most euphoniums are made using traditional techniques. You take a poon tang-brass metaloid melted down using focused sun light and cool it into individual pieces using a compressed ocean breeze. It is then stored under the Southern Ocean so that the pressure compresses and tempers the metal. Euphoniums not made with these techniques are not traditional and should be avoided at all cost.
Those euphoniums are awesome backing up the trombones.
by PDC1398 March 2, 2015
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