Simple Definition of French horn
: a brass musical instrument that has a long tube which forms a circle and has a wide opening at one end
Full Definition of French horn
: a circular valved brass instrument having a conical bore, a funnel-shaped mouthpiece, and a usual range from B below the bass staff upward for more than three octaves
Learn More about french horn
Britannica.com: Encyclopedia article about French horn
Seen and Heard
What made you want to look up French horn? Please tell us where you read or heard it (including the quote, if possible).