Source : Webster's Revised Unabridged Dictionary (1913)

Decide \De*cide"\, v. t. [imp. & p. p. {Decided}; p. pr. & vb.
   n. {Deciding}.] [L. dec[=i]dere; de- + caedere to cut, cut
   off; prob. akin to E. shed, v.: cf. F. d['e]cider. Cf.
   {Decision}.]
   1. To cut off; to separate. [Obs.]

            Our seat denies us traffic here; The sea, too near,
            decides us from the rest.             --Fuller.

   2. To bring to a termination, as a question, controversy,
      struggle, by giving the victory to one side or party; to
      render judgment concerning; to determine; to settle.

            So shall thy judgment be; thyself hast decided it.
                                                  --1 Kings xx.
                                                  40.

            The quarrel toucheth none but us alone; Betwixt
            ourselves let us decide it then.      --Shak.

Source : WordNet®

deciding
     adj : having the power or quality of deciding; "the crucial
           experiment"; "cast the deciding vote"; "the
           determinative (or determinant) battle" [syn: {crucial},
            {deciding(a)}, {determinant}, {determinative}, {determining(a)}]
     n : the cognitive process of reaching a decision; "a good
         executive must be good at decision making" [syn: {decision
         making}]