de·fin·i·tive 
(dĭ-fĭnĭ-tĭv)
(dĭ-fĭnĭ-tĭv)adj.
1. Serving to define or identify as distinct from others: "The Enlightenment pushed this project further trying to make science and its hallmark method definitive of the rational life" (Peter Machamer).
2. Supplying or being a final settlement or decision; conclusive: "The fall of the city Constantine had founded marked the definitive end of the Christian Eastern Empire" (James Carroll). See Synonyms at decisive.
3. Authoritative and complete: a definitive biography. See Usage Note at definite.
4. Mass produced in indefinite quantities over an indefinite period of time. Used of postage stamps.
5. Biology Fully formed or developed, as an organ or structure.
n.
1. Grammar A word that defines or limits, such as the definite article or a demonstrative pronoun.
2. A definitive postage stamp.
de·fini·tive·ly adv.
de·fini·tive·ness n.
- credal
- credence
- credential
- credentialism
- credenza
- credibility
- credibility gap
- credible
- credibleness
- credibly
- credit
- creditability
- creditable
- creditableness
- creditably
- credit bureau
- credit card
- credit-default swap
- credit derivative
- credit hour
- credit line
- creditor
- credit rating
- credit union
- creditworthiness