WordReference Random House Learner's Dictionary of American English © 2017
de•fin•i•tive /dɪˈfɪnɪtɪv/USA pronunciation   adj. 
  1. serving to define, set, or specify definitely:gave a definitive statement on the crisis.
  2. most reliable or complete:the definitive text on disorders of the circulatory system.
de•fin•i•tive•ly, adv. 

WordReference Random House Unabridged Dictionary of American English © 2017
de•fin•i•tive  (di fini tiv),USA pronunciation adj. 
  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. Developmental Biology[Biol.]fully developed or formed;

  1. Grammara defining or limiting word, as an article, a demonstrative, or the like.
  2. Stamps[Philately.]a stamp that is a regular issue and is usually on sale for an extended period of time. Cf. commemorative (def. 2).
de•fini•tive•ly, adv. 
de•fini•tive•ness, n. 
  • Latin dēfīnītīvus, equivalent. to dēfīnīt(us) (see definite) + -īvus -ive
  • Old French
  • Middle English 1350–1400
    • 3.See corresponding entry in Unabridged complete, absolute, ultimate, supreme.

Collins Concise English Dictionary © HarperCollins Publishers::

definitive /dɪˈfɪnɪtɪv/ adj
  1. serving to decide or settle finally; conclusive
  2. most reliable, complete, or authoritative
  3. serving to define or outline
  4. fully developed; complete
  5. (of postage stamps) permanently on sale
  1. a word indicating specificity of reference, such as the definite article or a demonstrative adjective or pronoun

deˈfinitively adv

'definitive' also found in these entries:

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