one of several parts into which a story, plan, or amount of money owed has been divided, so that each part happens or is paid at different times until the end or total is reached(小說分期連載的)一節;(分期付款的)一期
The novel has been serialized for radio in five instalments.這部小說已在電台進行了5次分期播送。
We agreed to pay for the car by/in instalments.我們同意分期付款購買小汽車。