The Collaborative International Dictionary of English v.0.48:
Stuffiness \Stuff"i*ness\, n. The quality of being stuffy. [1913 Webster]WordNet (r) 3.0 (2006):
stuffiness n 1: state of obstruction or stoppage or air in the nose or throat 2: the quality of being close and poorly ventilated [syn: stuffiness, closeness] 3: dull and pompous gravity [syn: stodginess, stuffiness]