noun

1. Archaic an infantry soldier employed to carry and throw grenades
2. a member of a special regiment or corps, as of the Grenadier Guards of the British Army, attached to the royal household
3. any of a family (Macrouridae, order Gadiformes) of deep-sea bony fishes with a long, tapering tail, large head, and soft fins

Etymology: Fr < grenade: see grenade