definitive

(noun): (grammar) a word, such as a definite article or demonstrative pronoun, that defines or limits something
(noun): An ordinary postage stamp that is part of a series of all denominations or is reprinted as needed to meet demand
(adjective): Explicitly defined
(adjective): Conclusive or decisive
(adjective): Definite, authoritative and complete
(adjective): Limiting; determining
(adjective): General, not issued for commemorative purposes
(adjective): Determined; resolved.