1. The act of fastening things together
   "The fastening of the seat belt is essential for safety";
   - attachment
    
2. Restraint that attaches to something or holds something in place
   "The tent's fastenings kept it secure in the strong wind";
   - fastener, holdfast, fixing

1. Cause to be firmly attached
   "fasten the lock onto the door";
   - fix, secure
    
2. Attach to
   "They fastened various nicknames to each other"
    
3. Make tight or tighter
   "fasten the wire";
   - tighten
    
4. Become fixed or fastened
   "This dress fastens in the back"

Derived forms: fastenings

Type of: alter, attach, change, connection, connexion [Brit], constraint, joining, modify, restraint

Antonym: unfasten

Encyclopedia: Fastening