noun, plural em·bou·chures [ahm-boo–shoo rz; ahm-boo-shoo rz; French ahn-boo-shyr] /ˌɑm bʊˈʃʊərz; ˈɑm bʊˌʃʊərz; French ɑ̃ buˈʃür/.
- the mouth of a river.
- the opening out of a valley into a plain.
- the mouthpiece of a wind instrument.
- the adjustment of a player’s mouth to such a mouthpiece.
- the mouth of a river or valley
- the correct application of the lips and tongue in playing a wind instrument
- the mouthpiece of a wind instrument