[1] : The Collaborative International Dictionary of English v.0.48

causerie \cause`rie"\, n. f., fr. causer to chat.
   informal talk or discussion, as about literary matters; light
   conversation; chat.
   webster 1913 suppl.

[2] : WordNet (r) 2.0

causerie
     n : light informal conversation for social occasions syn: chitchat,
          small talk, gab, gabfest, gossip, tittle-tattle,
          chin-wag, chin-wagging
see also:
chitchat small talk gab gabfest gossip tittle-tattle 
chin-wag chin-wagging 

[3] : Moby Thesaurus II by Grady Ward, 1.0

54 moby thesaurus words for "causerie":
   article, chat, chin, coze, cozy chat, descant, discourse,
   discussion, disquisition, dissertation, essay, etude, examination,
   excursus, exposition, feature, first approach, friendly chat, gam,
   heart-to-heart talk, homily, introductory study, little talk,
   lucubration, memoir, monograph, morceau, note, outline, pandect,
   paper, paragraph, piece, preliminary study, prolegomenon, prose,
   rap, research paper, screed, sketch, special article, study,
   survey, talk, term paper, tete-a-tete, theme, thesis, tract,
   tractate, treatise, treatment, visit, yarn

Causerie >> C Words
Causerie, definition of term: Causerie
causerie_pag1.html