Meaning of “customary” - Learner’s Dictionary

customary

adjective uk us /ˈkʌstəməri/

normal or expected for a particular person, situation, or society:

[ + to do sth ] It is customary for the chairman to make the opening speech.
customarily uk us /ˌkʌstəˈmerəli/ adverb

(Definition of “customary” from the Cambridge Learner’s Dictionary © Cambridge University Press)