1. Step or place one's foot on
   "Be careful not to stand on the broken glass"
    
2. Maintain or insist upon firmly
   "He stood on his principles despite pressure to change"
    
3. Depend or rely on
   "The success of the project stands on your participation"
    
4. (nautical) sail or steer in a particular direction
   "The ship stood on toward the harbour"

Derived forms: stood on, standing on, stands on