Keyhole meaning

kēhōl
Frequency:
The hole in a lock into which a key fits.
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(basketball) The key.
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An opening (in a lock) into which a key is inserted.
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The hole in a lock where the key is inserted and turns.
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(carpentry) A hole or excavation in beams intended to be joined together, to receive the key that fastens them.
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(engineering) A mortise for a key or cotter.
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(lasers)

Laser keyhole welding.

Keyhole plasma.

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Origin of keyhole