clar·i·net (kl?r??-n?t?)n. A woodwind instrument having a straight cylindrical tube with a flaring bell and a single-reed mouthpiece, played by means of finger holes and keys.[French clarinette, feminine diminutive of Old French clarin, clarion, clarion; see clarion, or of Provençal clarin, oboe (from Old Provençal clar, clear, from Latin cl?rus; see clear).]clar?i·net?ist, clar?i·net?tist n.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.clarinet (?klær??n?t) n1. (Instruments) a keyed woodwind instrument with a cylindrical bore and a single reed. It is a transposing instrument, most commonly pitched in A or B flat. Obsolete name: clarionet 2. (Music, other) an orchestral musician who plays the clarinet[C18: from French clarinette, probably from Italian clarinetto, from clarino trumpet] ?clari?nettist, ?clari?netist nCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014clar?i?net (?klær ??n?t) n. a woodwind instrument in the form of a cylindrical tube with a single reed attached to its mouthpiece. [1790?1800;