In*stall"ment (?), n. [Written also instalment.]
1.
The act of installing; installation.
Take oaths from all kings and magistrates at their installment, to do impartial justice by law.
Milton.
2.
The seat in which one is placed.
[Obs.]
The several chairs of order, look, you scour; . . .
Each fair installment, coat, and several crest
With loyal blazon, evermore be blest.
Shak.
3.
A portion of a debt, or sum of money, which is divided into portions that are made payable at different times. Payment by installment is payment by parts at different times, the amounts and times being often definitely stipulated.
Bouvier.
© Webster 1913.