- 1[countable, uncountable] custom (of doing something) an accepted way of behaving or of doing things in a society or a community an old/ancient custom the custom of giving presents at Christmas It's a local custom. It is the custom in that country for women to marry young.
- 2[singular] (formal or literary) the way a person always behaves synonym habit, practice It was her custom to rise early. As was his custom, he knocked three times.
Check pronunciation: custom