From The Collaborative International Dictionary of English v.0.48 :
Sprightliness \Spright"li*ness\ (-l[i^]*n[e^]s), n.
The quality or state of being sprightly; liveliness; life;
briskness; vigor; activity; gayety; vivacity.
[1913 Webster]
In dreams, observe with what a sprightliness and
alacrity does she [the soul] exert herself! --Addison.
[1913 Webster]
From WordNet (r) 3.0 (2006) :
sprightliness
n 1: animation and energy in action or expression; "it was a
heavy play and the actors tried in vain to give life to it"
[syn: liveliness, life, spirit, sprightliness]