[noun] [C] - a hole in a lock that you put a key intoShe peeked through the keyhole to see if anyone was there.(UK) Keyhole surgery is a medical operation in which a very small hole is made in a person's body to reach the organ or tissue inside.
KEYHOLE
Meaning of KEYHOLE in English
Cambridge English vocab. Кембриджский английский словарь. 2012