WordWeb Online

1. A payment of part of a debt; usually paid at regular intervals
   - installment [N. Amer]
    
2. A part of a broadcast serial
   - episode, installment [N. Amer]
    
3. A part of a published serial
   - installment [N. Amer]
    
4. The act of installing something (as equipment)
   "the telephone instalment took only a few minutes";
   - installation, installment [N. Amer]

Derived forms: instalments

Type of: beginning, broadcast, commencement, payment, program [N. Amer], programme [Brit, Cdn], start, text, textual matter

Part of: serial, serial publication, series

Encyclopedia: Instalment