From The Collaborative International Dictionary of English v.0.48 [gcide]:
Uprising \Up*ris"ing\, n.
1. Act of rising; also, a steep place; an ascent. "The steep
uprising of the hill." --Shak.
[1913 Webster]
2. An insurrection; a popular revolt. --J. P. Peters.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
uprising
n 1: organized opposition to authority; a conflict in which one
faction tries to wrest control from another [syn:
rebellion, insurrection, revolt, rising,
uprising]