Definition of grenade noun from the Oxford Advanced Learner's Dictionary

 

grenade

 noun
noun
BrE BrE//ɡrəˈneɪd//
 
; NAmE NAmE//ɡrəˈneɪd//
 
Weapons
 
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a small bomb that can be thrown by hand or fired from a gun rocket-propelled grenades see also hand grenade See related entries: Weapons Word Origin mid 16th cent. (in the sense ‘pomegranate’): from French, alteration of Old French (pome) grenate, from pome ‘apple’ + grenate ‘pomegranate’, on the pattern of Spanish granada. The bomb was so named because it supposedly resembled a pomegranate in shape.Extra examples I tossed the grenade through the open door. She was holding the grenade above her head, ready to throw. The hijackers were armed with hand grenades. His vehicle was damaged by a rocket-propelled grenade.
See the Oxford Advanced American Dictionary entry: grenade