Definitions

1. verb

to release or open something that has been fastened or locked, typically by releasing a latch or catch

“She had to unlatch the gate to let the horses in.”

2. verb

to release something from a fixed position, typically by releasing a mechanism that was holding it in place

“The mechanism in the old clock had to be unlatched before it could be repaired.”

3. noun

the act of releasing or opening something that has been fastened or locked

“The unlatching of the door was very loud.”

4. noun

a mechanism that releases or opens something that has been fastened or locked

“The unlatch on the gate was broken.”