custom

1. A practice followed by people of a particular group or region.
2. A habitual practice of a person: my custom of reading a little before sleep. See synonyms at habit.
3. Law. A common tradition or usage so long established that it has the force or validity of law.
4. 1. Habitual patronage, as of a store.
   2. Habitual customers; patrons.
5. customs
   1. Duties or taxes imposed on imported and, less commonly, exported goods.
   2. (used with a sing. verb) The governmental agency authorized to collect these duties.
   3. (used with a sing. verb) The procedure for inspecting goods and baggage entering a country.
6. Tribute, service, or rent paid by a feudal tenant to a lord.

1. Made to order.
2. Specializing in the making or selling of made-to-order goods: a custom tailor.

[Middle English custume, from Old French costume, from Latin cōnsuētūdō, cōnsuētūdin-, from cōnsuētus, past participle of cōnsuēscere, to accustom : com-, intensive pref.; see com– + suēscere, to become accustomed.]