(waterways) A simple single-gate lock on a river or canal.

plural of flash lock

An attachment to the muzzle of a firearm which reduces the amount of visible light created when fired

A form of handgun that fires projectiles of rubber of similar material, used mainly by law enforcement officers for riot control.

plural of flash-ball

plural of flash point

plural of flash frame

(chiefly telecommunications) A change made to a complex system with immediate effect, one made without a phase-in period. / (sports, basketball) A quick move from the weak side toward the ball.

A flashbang.

plural of flash bang