Meaning of “format” - Learner’s Dictionary

format

verb [ T ] us uk /ˈfɔːmæt/ present participle formatting, past tense and past participle formatted
COMPUTER

to prepare a computer disk so that information can be stored on it

DOCUMENT

to organize and design the words on a page or document

(Definition of “format verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)