UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈkʌstəm/US:USA pronunciation: IPA and respellingUSA pronuncation: IPA/ˈkʌstəm/ ,USA pronunciation: respelling(kustəm)

WordReference Collins English Usage © 2020
habit - custom
A habit is something that a person does often or regularly.
He had a nervous habit of biting his nails.
Try to get out of the habit of adding unnecessary salt in cooking.
A custom is something that people in a society do at a particular time of year or in a particular situation.
It is the custom to take chocolates or fruit when visiting a patient in hospital.
My wife likes all the old English customs.
'custom' also found in these entries:

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