1) Throwing a deadbolt 
• (p. pr. & vb. n.) of Latch • (n.) A loop or eye formed on the head rope of a bonnet, by which it is attached to the foot of a sail; -- called also latch and lasket.
to hold a device in its activated position without the use of external power or holding circuitry
A means of holding together a pair of mated connectors such that they will not walk apart under vibration or other physical forces. This usually only applies to board-to-cable or cable-to-cable connectors. 
Latch'ing noun (Nautical) A loop or eye formed on the head rope of a bonnet, by which it is attached to the foot of a sail; -- called also latch and lasket . [ Usually in plural]