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English definition of “latch”

latch

noun [C]     /lætʃ/
a device for keeping a door or gate closed , consisting of a metal bar that fits into a hole and is lifted by pushing down on another bar Locks and locksmithing on the latch UK closed but not locked : Don't forget to leave the front door on the latch if you go to bed before I get back.Open and closed
(Definition of latch noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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