(adj) abounding in or given to pompous or aphoristic moralizing; - Kathleen Barnes, Example:too often the significant episode deteriorates into sententious conversation
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
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. [ 1913 Webster ]
How he apes his sire, Ambitiously sententious! Addison. [ 1913 Webster ]