Misspelling of definitely. / Misspelling of defiantly.

(rare, genetics) The parts of a chromosome that are not needed and are thus dispensable

(transitive) To turn so as to show another side. / (transitive) To turn towards the front. / (transitive, logic) To infer by obversion.

(television) North American TV standard for analog television. (Initialism of National Television Standards Committee. (USA))