Definitions
1.AdjectiveFighting or disposed to fight; belligerent, warlike. .mw-parser-output .defdate{font-size:smaller}
2.AdjectiveAggressively supporting of an idea, group, political or social cause, etc.; adamant, combative.
3.NounA soldier, a combatant.
4.NounAn entrenched or aggressive adherent to a particular cause, now especially a member of a particular ideological faction.
5.NounSomeone who supports the Trotskyist political view expressed in the newspaper Militant.