custom Definition

custom
noun

1. A traditional activity or practice.

Thesaurus: tradition, observance, convention, manner, etiquette, ritual, habit, practice, rite, ceremony, wont, rule; Antonym: departure.
2. A personal habit.
3. The body of established practices of a community; convention.
4. An established practice having the force of a law.
5. The trade or business that one gives to a shop, etc by regular purchases.

adj

1. Made to order.

Etymology: 12c: from French costume, from Latin consuetudo, from consuescere to grow accustomed to.