From Longman Dictionary of Contemporary Englishclarinetclar‧i‧net /ˌklærəˈnet/ noun [countable] 
APMa musical instrument like a long black tube, that you play by blowing into it and pressing keys to change the notes —clarinettist noun [countable]
APMa musical instrument like a long black tube, that you play by blowing into it and pressing keys to change the notes —clarinettist noun [countable]Examples from the Corpus
clarinet• His boots are laced up like a clarinet with knotted string.• A clarinet was in his hands.• The same remarks apply to the combination of flutes and clarinets.• The worldly-wise orchestrator will rather see to it that there is not an important clarinet part in the aforesaid section.• It also doubles violas or cellos with good effect and blends well with low or lowish clarinets.• That could not be said of the hectic, driven finale, marred by some rancid clarinet contributions.• We have already pointed out that clarinets in unison with high trumpets give them increased roundness of tone and certainty of attack.• She likes skating, writing letters, reading and playing the clarinet.Origin clarinet (1700-1800) French clarinette, probably from Medieval Latin clario; → CLARION CALL 