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Definition of Keyhole
1. Noun. The hole where a key is inserted.
Definition of Keyhole
1. n. A hole or apertupe in a door or lock, for receiving a key.
Definition of Keyhole
1. a hole for a key [n -S]
Medical Definition of Keyhole
1. 1. A hole or apertupe in a door or lock, for receiving a key. 2. A mortise for a key or cotter. Keyhole limpet, 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. Source: Websters Dictionary (01 Mar 1998)