| Noun | 1. | installment - a payment of part of a debt; usually paid at regular intervals | |
| 2. | installment - a part of a broadcast serialserial, series - a serialized set of programs; "a comedy series"; "the Masterworks concert series" | |
| 3. | installment - a part of a published serialtext, textual matter - the words of something written; "there were more than a thousand words of text"; "they handed out the printed text of the mayor's speech"; "he wants to reconstruct the original text" | |
| 4. | installment - the act of installing something (as equipment); "the telephone installation took only a few minutes" | |