WordWeb Online

1. At or on or to the masthead or upper rigging of a ship
   "climbed aloft to unfurl the sail"
    
2. Upward
   "the good news sent her spirits aloft"
    
3. At or to great height; high up in or into the air
   "eagles were soaring aloft"; "dust is whirled aloft"
    
4. In the higher atmosphere above the earth
   "weather conditions aloft are fine"

Encyclopedia: Aloft