crossbolt lock

[ kraws-bohlt, kros- ]
/ ˈkrɔsˌboʊlt, ˈkrɒs- /

noun

a lock controlling two bolts moving in opposite directions, as to the top and bottom of a doorframe.

Origin of crossbolt lock

Related forms

cross·bolt·ed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019