/ biːk; NAmE / noun
1.
the hard pointed or curved outer part of a bird's mouth
SYN bill :
The gull held the fish in its beak.
—picture at bird
2.
( humorous ) a person's nose, especially when it is large and/or pointed
3.
( old-fashioned , BrE , slang ) a person in a position of authority, especially a judge
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WORD ORIGIN
senses 1 to 2 Middle English : from Old French bec , from Latin beccus , of Celtic origin.
sense 3 late 18th cent.: probably from criminals' slang.