embouchure

UK: /ˌɒmbʊˈʃʊə/

US: (äm′bŏŏ shŏŏr′, äm′bŏŏ shŏŏr′; Fr. än bo̅o̅ shyr′)

Inflections of 'embouchure' (n): npl: embouchures

WordReference Random House Unabridged Dictionary of American English © 2025

em•bou•chure  (äm′bŏŏ shŏŏr′, äm′bŏŏ shŏŏr′; Fr. än bo̅o̅ shyr′), n., pl. -chures 

(-shŏŏrz′; Fr. -shyr′). 
1. the mouth of a river.
2. the opening out of a valley into a plain.
3. Music and Dance
   • the mouthpiece of a wind instrument.
   • the adjustment of a player's mouth to such a mouthpiece.

• Latin bucca puffed cheek) + -ure -ure
• French, equivalent. to embouch(er) to put (an instrument) to one's mouth (em- em- + bouche mouth
• 1750–60

Collins Concise English Dictionary © HarperCollins Publishers::

embouchure / ˌɒmbʊˈʃʊə/ noun

1. the mouth of a river or valley
2. the correct application of the lips and tongue in playing a wind instrument
3. the mouthpiece of a wind instrument

Etymology: 18th Century: from French, from Old French emboucher to put to one's mouth, from bouche mouth, from Latin bucca cheek