What does DEAD BOLT. stand for?

What does DEAD BOLT. mean? We have 2 definitions. Read most used DEAD BOLT. meanings below.

THUMB DEAD BOLT. — A type of single cylinder lock often used in hotels. A door locked with such a lock can be opened from the inside by hand (or “thumb”) rather than a key, offering a quick exit in case of emergency
DEAD BOLT. — A type of door lock often used in hotels that, when locked, extends a heavy metal projection (or bolt) into the door jamb. See also thumb dead bolt.

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