Adjective belligerent has 2 senses
  1. aggressive, belligerent - characteristic of an enemy or one eager to fight; "aggressive acts against another country"; "a belligerent tone"
    Antonym: amicable (indirect, via hostile)
  2. belligerent, fighting, militant, war-ridden, warring - engaged in war; "belligerent (or warring) nations"; "a fighting war"
    Antonym: peaceful (indirect, via unpeaceful)
,Noun belligerent has 1 sense
  1. combatant, battler, belligerent, fighter, scrapper - someone who fights (or is fighting)
    --1 is a kind of person, individual, someone, somebody, mortal, human, soul
    --1 has particulars:
     defender, withstander; boxer, pugilist; brawler; butter; fencer, swordsman; gladiator; gouger; hell-kite, hell-rooster, gamecock; mauler; skirmisher; street fighter, tough; victor, master, superior; wrestler, grappler, matman