WordWeb Online

1. Inspiring awe, admiration or wonder
   "the awesome complexity of the universe";
   - amazing, awe-inspiring, awful [archaic], awing
    
2. [informal] Very good;of the highest quality
   "made an awesome speech";
   - excellent, first-class, fantabulous, splendid, beaut [Austral, NZ], top-drawer

See also: ace, blinding [Brit], brill [Brit], def, impressive, magic [Brit], sick [N. Amer], smokin', smoking, stonking [Brit], storming [Brit], super, super-duper, superior, wicked

Encyclopedia: Awesome