Adjective opponent has 1 sense
  1. opponent, opposing - characterized by active hostility; "opponent (or opposing) armies"
    Antonym: amicable (indirect, via hostile)
,Noun opponent has 2 senses
  1. opposition, opponent, opposite - a contestant that you are matched against
    --1 is a kind of contestant
    Derived form: verb oppose4
  2. adversary, antagonist, opponent, opposer, resister - someone who offers opposition
    --2 is a kind of person, individual, someone, somebody, mortal, human, soul
    --2 has particulars:
     dueler, dueller, duelist, duellist; enemy, foe, foeman, opposition; Luddite; withstander; Antichrist
    Derived form: verb oppose1