ˈmortise lock noun [countable] British English[
Date: 1700-1800;
Origin: mortise 'hole made for a part to fit into' (14-21 centuries), from Old French, probably from Arabic murtaj 'locked']
a strong lock that fits into a hole cut in the edge of a door
Synonym : dead bolt American English [TahlilGaran] Dictionary of Contemporary English ▲