a grenade or explosive shell that is thrown by hand and exploded either by impact or by means of a fuze.
a grenade or glass missile containing a chemical, for extinguishing fire.
Origin of hand grenade
First recorded in 1655–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a small metal or plastic canister containing explosives, usually activated by a short fuse and used in close combat
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012