Definitive
Part of speech: noun
Definition: a word, such as a definite article or demonstrative pronoun, that defines or limits something an ordinary postage stamp that is part of a series of all denominations or is reprinted as needed to meet demand
Part of speech: adjective
Definition: explicitly defined conclusive or decisive definite, authoritative and complete
Example sentence: No one could have less faith in the absolute and definitive importance of the work created by man, because I believe that this world is nothing but a dream.
Unequivocal
Part of speech: adjective
Definition: Without equal, matchless.Unambiguous; without equivocation or ambiguity; singularly clear, unmistakable, or unquestionable