1 one of the regular payments that you make for sth until you have paid the full amount （分期付款的）一期付款: to pay for sth in instalments 以分期付款的方式支付（某物）

2 one part of a story that is shown or published as a series （分期播送的节目或连载文字的）一集，一期，一回: Don't miss next week's exciting instalment. 下个星期的续集十分精彩，不要错过。