bon ‧ net /ˈbɒnət, ˈbɒnɪt $ ˈbɑː-/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Language: Old French ; Origin: bonet , from Medieval Latin abonnis 'hat' ]
1 . British English the metal lid over the front of a car SYN hood American English :
I’ll need to check under the bonnet.
2 .
a) a warm hat that a baby wears which ties under its chin
b) a type of hat that women wore in the past which tied under their chin and often had a wide ↑ brim
⇨ have a bee in your bonnet at ↑ bee (2)