A wind instrument, such as the French horn or the trombone, made of brass or other metal. Sound is produced through vibration of the lips and adjustment of the length of the sound tube by means of valves or a slide.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.