WordWeb Online

1. Secure with (or as if with) ropes in order to prevent movement or escape
   "tie down the prisoners";
   - tie up, bind, truss
    
2. Restrain from independence by an obligation
   "He was tied down by his work"

Derived forms: tied down, tying down, ties down

Type of: bind, confine, constrain, hold, obligate, oblige, restrain

Encyclopedia: Tie down