Wordnet 3.0
NOUN (1)
1.
playful humor;
The Collaborative International Dictionary of English v.0.48:
Facetious \Fa*ce"tious\, a. [Cf. F. fac['e]tieux. See
Faceti[ae].]
1. Given to wit and good humor; merry; sportive; jocular; as,
a facetious companion.
[1913 Webster]
2. Characterized by wit and pleasantry; exciting laughter;
as, a facetious story or reply. -- Fa*ce"tious*ly, adv.
-- Fa*ce"tious*ness, n.
[1913 Webster]
WordNet (r) 3.0 (2006):
facetiousness
n 1: playful humor
Moby Thesaurus II by Grady Ward, 1.0:
18 Moby Thesaurus words for "facetiousness":
brilliance, cleverness, funniness, humorousness, jocoseness,
jocularity, joking, joshing, keen-wittedness, keenness,
nimble-wittedness, pleasantry, pungency, quick-wittedness,
saltiness, sharpness, smartness, wittiness