The Collaborative International Dictionary of English v.0.48:
Conceitedness \Con*ceit"ed*ness\, n. The state of being conceited; conceit; vanity. --Addison. [1913 Webster]WordNet (r) 3.0 (2006):
conceitedness n 1: the trait of being unduly vain and conceited; false pride [syn: conceit, conceitedness, vanity] [ant: humbleness, humility]