The Collaborative International Dictionary of English v.0.48:

Concise \Con*cise"\, a. [L. concisus cut off, short, p. p. of
   concidere to cut to pieces; con- + caedere to cut; perh. akin
   to scindere to cleave, and to E. shed, v. t.; cf. F. concis.]
   Expressing much in a few words; condensed; brief and
   compacted; -- used of style in writing or speaking.
   [1913 Webster]

         The concise style, which expresseth not enough, but
         leaves somewhat to be understood.        --B. Jonson.
   [1913 Webster]

         Where the author is . . . too brief and concise,
         amplify a little.                        --I. Watts.

   Syn: Laconic; terse; brief; short; compendious; summary;
        succinct. See Laconic, and Terse.
        [1913 Webster]

WordNet (r) 3.0 (2006):

concise
    adj 1: expressing much in few words; "a concise explanation"
           [ant: prolix]