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cus‧tom‧a‧ry

1 something that is customary is normal because it is the way something is usually done [= usual]
it is customary (for somebody) to do something
In some cultures it is customary for the bride to wear white.
In some cultures it is customary for the bride to wear white.2 [only before noun] someone's customary behaviour is the way they usually do things [= usual]:
Barbara answered with her customary enthusiasm.
Barbara answered with her customary enthusiasm. —customarily
adverb
adverb