Related topics: Daily Life
a small metal or plastic object used to keep a door, gate, or window closed:
Gwen lifted the latch and opened the gate.
2 especially British EnglishD
a type of lock for a door that you can open from the inside by turning a handle, but that you need a key to open from the outside
on the latch (=shut but not locked)
Ray went out, leaving the door on the latch.