|ämbü|shu̇(ə)r, -bə|- noun
( -s )
Etymology: French, from (s') emboucher to flow into, from em- en- (I) + bouche mouth, mouth of a river, from Latin bucca cheek — more at pock
1. : the mouth of a river ; also : expansion of a river valley into a plain
2.
a. : the position and use of the lips in producing a musical tone on a wind instrument — called also lip, lipping
b. : the mouthpiece of a musical instrument
3. : bouche 2