n.
Pronunciation: ' äm-bü- ˌ shu ̇ r, ˌ äm-bü- '
Function: noun
Etymology: French, from ( s' ) emboucher to flow into, from en- + bouche mouth ― more at DEBOUCH
Date: 1760
1 : the position and use of the lips, tongue, and teeth in playing a wind instrument
2 : the mouthpiece of a musical instrument