euphonium

American  

[yoo-foh-nee-uhm] / yuˈfoʊ ni əm /

noun

1. a brass musical instrument similar to the baritone tuba but somewhat smaller, with a wider bore and mellower tone, and often having a second bell.

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euphonium British  

/ juːˈfəʊnɪəm /

noun

1. a brass musical instrument with four valves; the tenor of the tuba family. It is used mainly in brass bands

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Etymology

Origin of euphonium

First recorded in 1860–65; euph(ony) + (harm)onium

Example Sentences

Carys's 11-year-old sister, Eliza, who plays the euphonium, will also perform at the Abbey.

From BBC • Dec. 5, 2025

Recall that lone euphonium and piano at the beginning and end of Jackie DeShannon’s recording of “What the World Needs Now.”

From Washington Post • Feb. 10, 2023

The last pieces to go were a piano keyboard and euphonium our sons no longer needed.

From Seattle Times • Jun. 7, 2021

From the day I started playing euphonium in 5th grade through my senior year of high school, music and band had been the foundation of my social life.

From New York Times • Nov. 23, 2019

The Ring also called for the invention of subsequently dubbed 'Wagner tubas, a hybrid that combined elements of the French horn, trombone and euphonium.

From "The Story of Music" by Howard Goodall