2 definitions found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Keyhole \Key"hole`\, n.
1. A hole or apertupe in a door or lock, for receiving a key.
2.
a (Carp.) A hole or excavation in beams intended to be
joined together, to receive the key which fastens
them
b (Mach.) a mortise for a key or cotter.
{Keyhole limpet} (Zo["o]l.), a marine gastropod of the genus
Fissurella and allied genera. See {Fissurella}.
{Keyhole saw}, a narrow, slender saw, used in cutting
keyholes, etc., as in doors; a kind of compass saw or fret
saw.
{Keyhole urchin} (Zo["o]l.), any one of numerous clypeastroid
sea urchins, of the genera {Melitta}, {Rotula}, and
{Encope}; -- so called because they have one or more
perforations resembling keyholes.
From WordNet r 1.6 [wn]:
keyhole
n : the hole where a key is inserted
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