1.NounA form of bomb, launched from a ship or dropped from an aircraft, that is designed to detonate at a certain depth underwater for the purposes of attacking a submerged enemy, especially a submarine.
2.NounSynonym of bomb shot (“type of mixed drink”).
3.VerbTo attack (a target, usually a submarine) with depth charges.
"After the freighter was torpedoed, its escorting destroyers depth charged the submarine for two hours, but failed to sink it."