Custom
Custom, customary, or consuetudinary may refer to:

Traditions, laws, and religion
Convention (norm), a set of agreed, stipulated or generally accepted rules, norms, standards or criteria, often taking the form of a custom
Mores, what is widely observed in a particular culture, considered to be practiced by persons of good moral character
Social norm, a rule that is socially enforced
Tradition
Customary law or consuetudinary, laws and regulations established by common practice
Customary (liturgy) or consuetudinary, a Christian liturgical book describing the adaptation of rites and rules for a particular context
Custom (Catholic canon law), an unwritten law established by repeated practice
Customary international law, an aspect of international law involving the principle of custom
Minhag (pl. minhagim), Jewish customs
ʿUrf (Arabic: العرف), the customs of a given society or culture

Import and export
Customs, a tariff on imported or exported goods
Custom house

Modification
Modding
Bespoke, anything commissioned to a particular specification
Custom car
Kustom (cars)
Custom motorcycle

Brands, titles, and proper names
Custom (guitar), a model of guitar made by Fender
Custom (musician), stage name for New York-based musician Duane Lavold
Customs (TV series), an Irish television series that focuses on the daily lives of customs officers
Kimber Custom, a type of pistol
Customs (album), a 1989 album by Savage Republic

See also
Customs officer
Kustom (disambiguation)