High Explosive (HE) round: an artillery or mortar projectile containing explosive filler designed to inflict damage through blast and fragmentation effects.

High-explosive anti-tank round fired from underbarrel grenade launchers, designed to penetrate armored targets using a shaped charge warhead.

A single-use or disposable underbarrel grenade launcher is a type that is intended to be used once and then discarded, often due to its low cost or limited functionality.