/ahm'boo shoor", ahm"boo shoor'/ ; Fr. /ahonn booh shyuurdd"/ , n. , pl. embouchures /-shoorz"/ ; Fr. /-shyuurdd"/ .
1. the mouth of a river.
2. the opening out of a valley into a plain.
3. Music.
a. the mouthpiece of a wind instrument.
b. the adjustment of a player's mouth to such a mouthpiece.
[ 1750-60; embouch ( er ) to put (an instrument) to one's mouth ( em- EM- + bouche mouth bucca puffed cheek) + -ure -URE ]