giant in WordNet English dictionary

1. someone or something that is abnormally large and powerful
   giant  goliath  behemoth  monster  colossus 
   
2. a person of exceptional importance and reputation
   colossus  behemoth  giant  heavyweight  titan 
   
3. any creature of exceptional size
   giant 
   
4. an unusually large enterprise
   "Walton built a retail giant"
   giant 
   
5. a very bright star of large diameter and low density (relative to the Sun)
   giant star  giant 
   
6. an imaginary figure of superhuman size and strength; appears in folklore and fairy tales
   giant 
   
7. a very large person; impressive in size or qualities
   giant  hulk  heavyweight  whale 
   

1. of great mass; huge and bulky
   "a jumbo jet"; "jumbo shrimp"
   elephantine  gargantuan  giant  jumbo