a custom, convention, or established precedent; an established way of doing things
慣例に従って挨拶をした。
We greeted each other according to custom.
その慣例は地域ごとに異なる場合がある。
That convention may differ from region to region.
組織の慣例として毎年この手続きを行う。
As an organizational custom, we carry out this procedure every year.