undefinitive

adjective

1. most reliable or complete, as of a text, author, criticism, study, or the like: the definitive biography of Andrew Jackson.
2. serving to define, fix, or specify definitely: to clarify with a definitive statement.
3. having its fixed and final form; providing a solution or final answer; satisfying all criteria: the definitive treatment for an infection; a definitive answer to a dilemma.
4. Biology. fully developed or formed; complete.

noun

5. a defining or limiting word, as an article, a demonstrative, or the like.
6. Philately. a stamp that is a regular issue and is usually on sale for an extended period of time.Compare commemorative(def 2).

adjective

1. serving to decide or settle finally; conclusive
2. most reliable, complete, or authoritativethe definitive reading of a text
3. serving to define or outline
4. zoology fully developed; completethe definitive form of a parasite
5. 1. (of postage stamps) permanently on sale
   2. (as noun)a definitive postage stamp

noun

6. grammar a word indicating specificity of reference, such as the definite article or a demonstrative adjective or pronoun

adj.late 14c., from Old French definitif (12c.), from Latin definitivus “explanatory, definitive,” from past participle stem of definire (see define). Related: Definitively.