What does customary mean?
"Customary" describes anything that accords with established custom — a practice so widely accepted in a given society, profession, or setting that people expect it and follow it without needing a rule. A customary tip at a restaurant, a customary handshake, or a customary day of rest are all behaviors sustained by tradition and repetition rather than formal law. The word also has an important technical sense: in law, "customary" refers to norms grounded in long-standing usage rather than written statutes, as in customary law or customary international law. Derived from "custom," via Latin and ultimately from a root meaning habit or usage, the adjective carries a neutral-to-formal tone and appears frequently in legal, diplomatic, historical, and cultural writing. Choosing "customary" instead of the simpler "usual" signals that a practice rests on convention and continuity, making the word especially useful when explaining why things are done a certain way.
According to or conforming with established custom or common practice; usual or habitual.
"After the performance, the conductor received the customary standing ovation."
Often used impersonally in the phrase "it is customary to...".
(Of law, rights, or rules) Based on long-established usage or tradition rather than written statute.
"Land rights in the region were governed by customary law passed down orally for generations."
Frequent in legal and anthropological contexts, e.g. customary law, customary international law.
The word 'customary' and 'costume' come from the same root — because what we wear is often just custom made visible.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of customary
The adjective "customary" derives from "custom," which entered Middle English around the late medieval period via Old French "costume" (or "custume") from Latin "consuetudinem," meaning habit or usage, formed from "consuescere" (to become accustomed). The suffix "-ary" was added to form an adjective meaning "of or relating to custom." Its cognates include "costume" — originally simply what one wears according to custom — as well as "accustom" and "customer." The word has been in English use since at least the early modern period.
Related word forms
How customary is actually used
Neutral to formal register; common in legal, diplomatic, and anthropological writing. In everyday speech, 'usual' is often preferred as lighter and more conversational, while 'customary' signals that a practice rests on tradition or convention rather than mere frequency.
Easily confused with customary
'Accustomed' describes someone being familiar with or habituated to something through experience, while 'customary' describes the practice itself as being standard or conventional.