wind instrument

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A musical instrument, such as a clarinet, trumpet, or harmonica, in which sound is produced by the movement of an enclosed column of air, especially the breath, and excluding keyboard instruments such as the organ or accordion. Woodwind and brass instruments are both types of wind instruments.
• noun Informal A woodwind instrument, as opposed to a brass instrument.

from The Century Dictionary.

• noun A musical instrument the sound of which is produced by a stream of compressed air, usually by the breath.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun music a musical instrument that produces sound when air flows through it; reed instruments and brass instruments.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a musical instrument in which the sound is produced by an enclosed column of air that is moved by the breath