noun
A small explosive device, designed to be thrown by hand or launched using a rifle, grenade launcher, or rocket.
(obsolete) A pomegranate.
(heraldry) A charge similar to a fireball, and made of a disc-shaped bomb shell, but with only one set of flames at the top.
(slang) An unattractive girl.
verb
To use grenade(s) upon.
(motor racing, slang, intransitive) Of an engine: to be violently wrecked so that the internal components burst out.