Trombone (noun)

1. A musical instrument consisting of a long metal tube that is bent in a U-shape and played by buzzing a lips into a cup-shaped mouthpiece at one end while pressing valves to change the length of the vibrating column of air inside the tube.
2. A similar instrument with a cylindrical or conical bore and a cup-shaped mouthpiece.

Origin:

From italian trombone, from tromba, trumpet + -one, augmentative suffix.

Examples:

1. He played the trombone in the school band.
2. The trombone was her favourite instrument.
3. The trombone section provided a strong bass line for the jazz ensemble.
4. The trombone solos were some of the highlights of the concert.
5. The trombone added a warm and rich sound to the orchestra.