English Reference
Verb

customize

v.
B2 Upper Intermediate US /ˈkəstəˌmaɪz/ cus·tom·ize UK spelling customized, customizes, customizing

v.to change something so that it fits your personal needs or tastes. You do this to make an object or a computer program work exactly how you want it to.

v.to modify something to suit a particular individual or task. Often refers to the adjustment of software settings or the physical alteration of consumer goods.


SIMPLE

You can customize the home screen on your phone.

CONTEXTUAL

The software allows users to customize their dashboard so they only see the most relevant data.

COMPLEX

While mass production lowered costs, modern manufacturing now allows companies to customize products for individual clients without significantly increasing the final retail price.

Usage

The verb is transitive and requires a direct object. In British English, it is frequently spelled 'customise'.

Pitfall
I customized to my carI customized my car

The verb is transitive and should not be followed by the preposition 'to' before the object.

MySpace:  Teens flocked to this early social media site, where they could shape their own identities, customizing pages with music, photos and designs to connect with friends.

Smithsonian Magazine· 17 Jun 2026

From custom + -ize. First attested in 1934 in American English.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level B2 · Upper Intermediate
Frequency Frequent
Updated