Source : Webster's Revised Unabridged Dictionary (1913)

Sententious \Sen*ten"tious\, a.[L. sentenciosus: cf. F.
   sentencieux.]
   1. Abounding with sentences, axioms, and maxims; full of
      meaning; terse and energetic in expression; pithy; as, a
      sententious style or discourse; sententious truth.

            How he apes his sire, Ambitiously sententious!
                                                  --Addison.

   2. Comprising or representing sentences; sentential. [Obs.]
      ``Sententious marks.'' --Grew. --- {Sen*ten"tious*ly},
      adv. -- {Sen*ten"tious*ness}, n.

Source : WordNet®

sententiously
     adv : in a pithy sententious manner; "she expressed herself
           pithily" [syn: {pithy}]