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:
In the English description:

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