The American Heritage® Dictionary of the English Language, 4th Edition
n. A low-pitched woodwind instrument with a double reed, having a long wooden body attached to a U-shaped lateral tube that leads to the mouthpiece. The range of this instrument is typically two octaves lower than that of the oboe.
n. A musical instrument in the woodwind family, having a double reed and, playing in the tenor and bass ranges.
v. To play the bassoon.
v. To make a bassoon-like sound.
the GNU version of the Collaborative International Dictionary of English
n. A wind instrument of the double reed kind, furnished with holes, which are stopped by the fingers, and by keys, as in flutes. It forms the natural bass to the oboe, clarinet, etc.
The Century Dictionary and Cyclopedia
n. A musical instrument of the oboe class, having a double reed, a long, curved metallic mouthpiece, and a doubled wooden tube or body.
n. A reed-pipe stop in an organ, having a quality of tone resembling that of the bassoon.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a double-reed instrument; the tenor of the oboe family
Word Usage
"During the rehearsal he suddenly stopped the orchestra and cried out: "F. sharp, F. sharp in the second bassoon is wrong", only to be answered by the first basson player, "Beg pardon, Sir, the second bassoon is absent today.""