Wordnet 3.0
NOUN (1)
1.
good-natured frankness;
The Collaborative International Dictionary of English v.0.48:
Bluffness \Bluff"ness\, n.
The quality or state of being bluff.
[1913 Webster]
WordNet (r) 3.0 (2006):
bluffness
n 1: good-natured frankness