From The Collaborative International Dictionary of English v.0.48 :
Resoluteness \Res"o*lute*ness\, n.
The quality of being resolute.
[1913 Webster]
From WordNet (r) 3.0 (2006) :
resoluteness
n 1: the trait of being resolute; "his resoluteness carried him
through the battle"; "it was his unshakeable resolution to
finish the work" [syn: resoluteness, firmness,
firmness of purpose, resolve, resolution] [ant:
irresoluteness, irresolution]