Webster's English Dictionary

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stability

sta.bil.i.ty \st*-'bil-*t-e-\ n 1: the quality, state, or degree of being 
   stable : as  1a: the strength to stand or endure : FIRMNESS  1b: the 
   property of a body that causes it when disturbed from a condition o f 
   equilibrium or steady motion to develop forces or moments that restore the 
   orginal condition 1c: resistance to chemical change or to physical 
   disintegration  2: a vow binding a monk for life to one monastery