custom

custom

CEFR: B1-B2 /cus-tom/ [k.ah1.s.t.ah0.m]

If something has been done a certain way for a long time and has become generally accepted, it's a custom. You can think of a custom being the same thing as a tradition.​ Here are examples:

Example Sentences:
It is custom for Americans to eat turkey on Thanksgiving.
It is custom for Koreans to make songpyeon on Chuseok.