What does custom mean?
A custom is an established and widely accepted practice within a particular society, community, or group — a way of behaving that has been handed down over time and carries the weight of tradition. Customs range from everyday habits of greeting and gift-giving to formal ceremonies marking births, weddings, and festivals, and they help define the identity of cultures, professions, and even families. The word also appears in commerce, where 'custom' refers to a customer's regular patronage of a shop, particularly in British usage ('thank you for your custom'). Used attributively, 'custom' describes things made to order for a specific person, as in a custom suit or custom software. Connotations are generally warm and respectful, evoking continuity and belonging, though customs may also be questioned when they conflict with modern values. Related forms include 'customary', 'customize', and 'customer'. Understanding this word illuminates how societies preserve their character across generations.
A traditional and widely accepted way of behaving or doing something that is specific to a particular society, place, or time.
"Bowing slightly when greeting elders is a custom in many East Asian cultures."
Often used with modifiers such as 'local', 'ancient', or 'long-standing'.
(Usually in plural) The regular patronage given to a shop or business by its customers.
"The corner shop has enjoyed our family's custom for three generations."
Chiefly British usage.
Made to the specifications of an individual customer; bespoke or personalized.
"He ordered a custom guitar built to his exact measurements."
Used attributively; 'custom-built', 'custom-made', and 'custom-designed' are frequent compounds.
The plural 'customs' commonly denotes multiple traditions, but note that 'the Customs' (capitalized) refers specifically to the government authority dealing with imports and exports — an entirely separate sense.
"Many regional customs have faded over the centuries."
The word 'custom' and 'costume' come from the very same Latin root — your habits and your outfit share a family tree.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of custom
The word 'custom' derives from Old French 'costume', borrowed from Latin 'consuetudinem', the accusative of 'consuetudo' meaning 'habit, usage, familiarity', itself formed from 'consuescere' ('to become accustomed'), built on 'suescere' ('to grow used to') plus the intensive prefix 'com-'. It entered Middle English in the medieval period, initially covering both habitual practice and customary dues or tolls. The same Latin root yields 'accustom', 'customary', 'customer', and, via a related French development, 'costume'.
Related word forms
How custom is actually used
As a noun, 'custom' is neutral to positive in connotation, suggesting tradition and continuity; it is common in formal and anthropological writing as well as everyday speech. In British English especially, 'custom' also denotes a shopkeeper's trade ('Thank you for your custom'), a usage less familiar to American readers. As an adjective before a noun, 'custom' implies personalization and often carries commercial overtones.
Easily confused with custom
'Custom' means a traditional practice or habit, while 'costume' refers to a set of clothes worn to represent a particular period, country, or character.
'Customer' is a person who buys goods or services from a shop or business, whereas 'custom' is a traditional practice or habitual patronage.