The Collaborative International Dictionary of English v.0.48:

Epigrammatic \Ep`i*gram*mat"ic\, Epigrammatical
\Ep`i*gram*mat"ic*al\, [L. epigrammaticus: cf. F.
   ['e]pigrammatique.]
   1. Writing epigrams; dealing in epigrams; as, an
      epigrammatical poet.
      [1913 Webster]

   2. Suitable to epigrams; belonging to epigrams; like an
      epigram; pointed; piquant; as, epigrammatic style, wit, or
      sallies of fancy.
      [1913 Webster]

WordNet (r) 3.0 (2006):

epigrammatic
    adj 1: terse and witty and like a maxim; "much given to
           apothegmatic instruction" [syn: aphoristic,
           apothegmatic, epigrammatic]

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "epigrammatic":
   aphoristic, apophthegmatic, apothegmatic, compendious, concise,
   laconic, piquant, pithy, pointed, proverbial, punchy, pungent,
   sententious, snappy, succinct, terse, trenchant, witty