vajraEtymologyFrom Sanskrit वज्र (vájra). Doublet of waker; see there for more.nounA Buddhist ceremonial mace and symbol, usually interpreted as both a diamond and a thunderbolt.“At the centre is a five-pronged vajra draped and bound with a coloured silk scarf, representing one of the Five Buddha wisdoms or activities.”One of the five central Buddhist principles, representing indestructible substance that cuts and penetrates through emotional instability or uncertainty.“Those five principles or buddha families are called vajra, ratna, padma, karma, and buddha.”The weapon of Indra, the god of heaven and the chief deity of the Rigvedic pantheon, used to kill sinners and ignorant persons.