customize

UK: /ˈkʌstəmaɪz/ US: /ˈkʌstəˌmaɪz/ ,(kus′tə mīz′)

Inflections of 'customize' (v): (⇒ conjugate)

customizes

v 3rd person singular (US & UK)

customizing

v pres p (US & UK)

customized

v past (US & UK)

customized

v past p (US & UK)

WordReference Random House Learner's Dictionary of American English © 2025

cus•tom•ize /ˈkʌstəˌmaɪz/   v. [~ + object] , -ized, -iz•ing. 

1. to modify or build (something) according to an individual's request:
   They'll customize your car to give you bucket seats.

cus•tom•i•za•tion /ˌkʌstəməˈzeɪʃən/  n. [uncountable]
cus•tom•iz•er, n. [countable]

WordReference Random House Unabridged Dictionary of American English © 2025

cus•tom•ize  (kus′tə mīz′), v.t. -ized, -iz•ing. 

1. to modify or build according to individual or personal specifications or preference:
   to customize an automobile.

Also,[esp. Brit.,] cus′tom•ise′. 

• custom + -ize 1930–35, American.

cus′tom•iz′a•ble, adj. 
cus′tom•i•za′tion, n. 
cus′tom•iz′er, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

customize, customise / ˈkʌstəˌmaɪz/ verb

1. (transitive) to modify (something) according to a customer's individual requirements