Definite traces back to the Latin word finire meaning "to limit, end, FINISH." Connect finish to definite and voilà: you can definitely spell definite correctly.

(Definition of definite from the Cambridge Academic Content Dictionary © Cambridge University Press)

If something such as a decision or an arrangement is definite, it is firm and clear, and unlikely to be changed. It's too soon to give a definite answer. Her Royal Highness has definite views …

Definite indicates precision and firmness, as in a definite decision. Definitive includes these senses but also indicates conclusiveness. A definite answer indicates a clear and firm answer …

DEFINITE definition: clearly defined or determined; not vague or general; fixed; precise; exact. See examples of definite used in a sentence.

Definition of definite adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

def•i•nite (def′ ə nit), adj. clearly defined or determined; not vague or general; fixed; precise; exact: a definite quantity; definite directions. having fixed limits; bounded with precision: a definite …