Source : Webster's Revised Unabridged Dictionary (1913)

Succinct \Suc*cinct"\, a. [L. succinctus, p. p. of succingere to
   gird below or from below, to tuck up; sub + cingere to gird.
   Cf. {Cincture}.]
   1. Girded or tucked up; bound; drawn tightly together.

            His habit fit for speed succinct.     --Milton.

   2. Compressed into a narrow compass; brief; concise.

            Let all your precepts be succinct and clear.
                                                  --Roscommon.

            The shortest and most succinct model that ever
            grasped all the needs and necessities of mankind.
                                                  --South.

   Syn: Short; brief; concise; summary; compendious; laconic;
        terse. -- {Suc*cinct"ly}, adv. -- {Suc*cinct"ness}, n.

Source : WordNet®

succinctness
     n : terseness and economy in writing and speaking achieved by
         expressing a great deal in just a few words [syn: {conciseness},
          {concision}, {pithiness}]