Lewis & Short

sententĭōsus, a, um, adj. [sententia, II. B. 2.], full of meaning, pithy, sententious (rare but Ciceron.): sententiosum et argutum genus dictionis, Cic. Brut. 95, 325.
Adv.: sententĭōsē.

  1. A. Full of meaning, suggestively: sententiose (dicere) sine verborum et ordine et modo (opp. composite) et apte sine sententiis, Cic. Or. 71, 236: oratione habitā graviter et sententiose, id. Inv. 1, 55, 106.
  2. B. Sententiously: saepe sententiose ridicula dicuntur, Cic. de Or. 2, 71, 286.