The definition of militant is at war, fighting or ready to fight.(adjective)
An example of a militant person is someone who always wants to battle.
Militant is defined as a person who is ready and willing to fight for a cause.(noun)
An example of a militant is a hostile, aggressive individual.
See militant in Webster's New World College Dictionary
Origin: ME < L militans, prp. of militare, to serve as a soldier < miles (gen. militis), soldier
See militant in American Heritage Dictionary 4
Origin: Middle English
Origin: , from Old French
Origin: , from Latin mīlitāns, mīlitant-
Origin: , present participle of mīlitāre, to serve as a soldier; see militate.
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