custom

American  

[kuhs-tuhm] / ˈkʌs təm /

noun

• customs
  plural

1. 

   a habitual practice; the usual way of acting in given circumstances.

2. habits or usages collectively; convention.

3. a practice so long established that it has the force of law.

4. such practices collectively.

5. Sociology. a group pattern of habitual activity usually transmitted from one generation to another.

6. toll; duty.

7. customs,

   1. (used with a singular or plural verb) duties imposed by law on imported or, less commonly, exported goods.

   2. (used with a singular verb) the government department that collects these duties.

   3. (used with a singular verb) the section of an airport, station, etc., where baggage is checked for contraband and for goods subject to duty.

8. regular patronage of a particular shop, restaurant, etc.

9. the customers or patrons of a business firm, collectively.

10. the aggregate of customers.

11. (in medieval Europe) a customary tax, tribute, or service owed by peasants to their lord.

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adjective

1. made specially for individual customers.

   custom shoes.

2. dealing in things so made, or doing work to order.

   a custom tailor.

custom British  

/ ˈkʌstəm /

noun

1. a usual or habitual practice; typical mode of behaviour

2. the long-established habits or traditions of a society collectively; convention

   custom dictates good manners

3. 1. a practice which by long-established usage has come to have the force of law

   2. such practices collectively (esp in the phrase custom and practice )

4. habitual patronage, esp of a shop or business

5. the customers of a shop or business collectively

6. (in feudal Europe) a tribute paid by a vassal to his lord

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adjective

1. made to the specifications of an individual customer (often in the combinations custom-built , custom-made )

2. specializing in goods so made

Usage

What does custom mean? As a noun, custom means a longstanding practice of a person (such as a daily habit) or a group (such as a cultural practice). As an adjective, custom describes something made to unique specifications, especially something one of a kind. Its synonym is custom-made. The word customs with an s refers to fees paid on imported goods, or the government department that handles such things. It is also the name of the checkpoint in the airport where incoming luggage and goods are inspected for prohibited items. Example: When I travel abroad, it’s my custom to bring home a custom-made souvenir that highlights the artistic customs of the people who live in that place. The items are usually very unique, which often leads to a lot of questions when I go through customs at the airport!

Synonym Usage

Custom, habit, practice mean an established way of doing things. Custom, applied to a community or to an individual, implies a more or less permanent continuance of a social usage: It is the custom to give gifts at Christmas time. Habit, applied particularly to an individual, implies such repetition of the same action as to develop a natural, spontaneous, or rooted tendency or inclination to perform it: to make a habit of reading the newspapers. Practice applies to a set of fixed habits or an ordered procedure in conducting activities: It is his practice to verify all statements.

Other Word Forms

Noun Inflected Forms

• customs
  plural

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Etymology

Origin of custom

First recorded in 1150–1200; Middle English custume, from Anglo-French; Old French costume, from Vulgar Latin co(n)s(uē)tūmin- (unrecorded), replacing Latin consuētūdin-, stem of consuētūdō “habit, practice, tradition,” from consuē(tus) “accustomed” (past participle of consuēscere “to accustom onself,” from con- con- + suēscere “to become accustomed,” akin to suus “one's own”) + -tūdō -tude; cf. costume

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Explanation

If something has been done a certain way for a long time and has become generally accepted, it's a custom. Asking strangers for candy on one night a year would seem strange if it weren't an established custom. If you have been imprisoned in a far off country when you were just trying to blend in, you might have misunderstood the local customs. Custom can be traced back to the Latin verb consuescere, meaning "to accustom," in other words "to get used to." Custom can also describe something that you order made just the way you want it. Your five-seated bicycle is very original; was it custom-made?

Example Sentences

See Examples For:

custom customs

Early on, he took an interest in computers, and, he said, in high school programmed custom real estate software for his uncles.

From The Wall Street Journal ● Oct. 15, 2026

Conflict Armament was shown shipping documentation for the equipment detailed in July which identified a Chinese precision-metal producer that advertises itself as a specialist manufacturer of custom aerospace parts.

From The Wall Street Journal ● Oct. 14, 2026

Her pretend “roommate,” another employee, did the same, and the display changed to a different set of apps in a custom green tint.

From The Wall Street Journal ● Oct. 13, 2026

Beyond custom silicon, Melius’s Reitzes pointed to major upside in the networking space.

From MarketWatch ● Oct. 12, 2026

One newspaper editor had sagely, if cynically, observed that “the usual custom is for the capital of new empires to be selected by the whim or caprice of a despot.”

From "Founding Brothers: The Revolutionary Generation" by Joseph J. Ellis

Bolat warned the "Made in Europe" plan threatened to disrupt the 30-year customs union between the EU and Turkey, and the "very strong and close supply chain integration".

From Barron's ● Oct. 15, 2026

Since 1995, the EU has had a customs union with Turkey, which is also a candidate to join the bloc.

From Barron's ● Oct. 15, 2026

How do you handle coming from a culture with different money customs from those of your friends?

From MarketWatch ● Oct. 13, 2026

But the combination of higher customs duties and quality control standards worked.

From BBC ● Oct. 5, 2026

This is evidenced by the customs and devices that were long retained by the Creeks.

From "An Indigenous People’s History of the United States" by Roxanne Dunbar-Ortiz

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