1. Tending to drift or move aimlessly; not fixed or steady
   "The drifty balloon floated wherever the wind took it"
    
2. Prone to forming or characterized by drifts, especially of snow, sand, or debris
   "The drifty snow created intricate patterns on the landscape"
    
3. [informal] Lacking focus or concentration; prone to daydreaming or distraction
   "He was feeling drifty after the long meeting"

Derived forms: driftiest, driftier