DTa strong lock that fits into a hole cut in the edge of a door 〔嵌入门里的〕榫眼锁,插锁,嵌锁SYN American English dead bolt →5see picture at 见图lock2
Examples from the Corpus
mortise lock• It had a mortise lock, a simple keyhole and no key.• Fit a five-lever mortise lock to the back door, or supplement the existing lock with a mortise deadlock.
Originmortise lock
(1700-1800)mortise“hole made for a part to fit into”((14-21 centuries)), from Old French, probably from Arabicmurtaj“locked”