[Middle English deffinite, defined, from Latin definitus, past participle of definire, to define; see define.]
(Usage Note: Definite and definitive both apply to what is precisely defined or explicitly set forth. But definitive most often refers specifically to a judgment or description that serves as a standard or reference point for others, as in the definitive decision of the court (which sets forth a final resolution of a judicial matter) or the definitive biography of Nelson (that is, the biography that sets the standard against which all other accounts of Nelson's life must be measured).)
1. Having distinct limits: definite restrictions on the sale of alcohol.
2. Indisputable; certain: a definite victory.
3. Clearly defined; explicitly precise: a definite statement of the terms of the will.
4. Grammar Limiting or particularizing.
a. Of a specified number not exceeding 20, as certain floral organs, especially stamens.
b. Cymose; determinate.
1. in a definite manner
2. (sentence modifier) certainly: he said he was coming, definitely.
unquestionably - used to confirm an assumption by a questioner