noun

• (countable) A Buddhist ceremonial mace and symbol, usually interpreted as both a diamond and a thunderbolt.
• (uncountable) One of the five central Buddhist principles, representing indestructible substance that cuts and penetrates through emotional instability or uncertainty.
• (Rigveda, Hindu mythology) The weapon of Indra, the god of heaven and the chief deity of the Rigvedic pantheon, used to kill sinners and ignorant persons.
• Alternative letter-case form of vajra [(countable) A Buddhist ceremonial mace and symbol, usually interpreted as both a diamond and a thunderbolt.]