Definition

1. Noun:
   • The hole in a lock into which the key is inserted: The specific opening designed to receive the key that operates a lock.

Usage

• The word "keyhole" is used to describe the physical opening in a lock mechanism. It is a compound noun formed from "key" and "hole." It is typically used in contexts related to locks, doors, security, or metaphorical descriptions of peering or spying.

Examples

• Noun:
  • She peered through the keyhole to see who was in the hallway.
  • The old door had a large, ornate keyhole.
  • He inserted the key into the keyhole and turned it.

Advanced Usage

• "keyhole" as a modifier: Used to describe something shaped like or relating to a keyhole.
  • The dress had a keyhole neckline at the back.
  • Keyhole surgery is a minimally invasive surgical technique.

Variants and Related Words

• Keyhole saw (n): A narrow-bladed saw used for cutting small, often curved, openings.
• Keyhole limpet (n): A type of marine mollusk with a shell featuring an opening resembling a keyhole.

Synonyms

• Lock opening: A more formal or descriptive term for the aperture.
• Keyway: A technical term, often referring to the groove in a lock or the slot in a key itself, but can sometimes be used interchangeably in non-technical contexts.

Related Idioms and Phrases

• "Through the keyhole": A phrase describing the act of secretly observing a limited view of something, often used literally or metaphorically.
  • The documentary gave us a glimpse through the keyhole into the life of the famous artist.
• "Keyhole view": A very narrow or restricted perspective.
  • From this vantage point, we only have a keyhole view of the proceedings below.

Noun

1. the hole where a key is inserted