enemy in WordNet English dictionary

1. an opposing military force
   "the enemy attacked at dawn"
   enemy 
   
2. any hostile group of people
   "he viewed lawyers as the real enemy"
   enemy 
   
3. an armed adversary (especially a member of an opposing military force)
   "a soldier must be prepared to kill his enemies"
   enemy  foe  foeman  opposition 
   
4. a personal enemy
   "they had been political foes for years"
   foe  enemy