Source : Webster's Revised Unabridged Dictionary (1913)

Precise \Pre*cise"\, a. [L. praecisus cut off, brief, concise,
   p. p. of praecidere to cut off in front, to cut off; prae
   before + caedere to cut: cf. F. pr['e]cis. Cf. {Concise}.]
   1. Having determinate limitations; exactly or sharply defined
      or stated; definite; exact; nice; not vague or equivocal;
      as, precise rules of morality.

            The law in this point is not precise. --Bacon.

            For the hour precise Exacts our parting hence.
                                                  --Milton.

   2. Strictly adhering or conforming to rule; very nice or
      exact; punctilious in conduct or ceremony; formal;
      ceremonious. --Addison.

            He was ever precise in promise-keeping. --Shak.

   Syn: Accurate; exact; definite; correct; scrupulous;
        punctilious; particular; nice; formal. See {Accurate}.
        -- {Pre*cise"ly}, adv. -- {Pre*cise"ness}, n.

Source : WordNet®

precisely
     adv 1: indicating exactness or preciseness; "he was doing precisely
            (or exactly) what she had told him to do"; "it was
            just as he said--the jewel was gone"; "it has just
            enough salt" [syn: {exactly}, {just}]
     2: in a precise manner; "she always expressed herself
        precisely" [syn: {incisively}, {exactly}] [ant: {imprecisely},
         {imprecisely}]
     3: just as it should be; "`Precisely, my lord,' he said" [syn:
        {exactly}, {on the nose}, {on the dot}, {on the button}]