Webster's English Dictionary

Enter the word to look up:

probability

prob.a.bil.i.ty \.pra:b-*-'bil-*t-e-\ n 1: the quality or state of being 
   probable  2: something probable  3: a mathematical basis for prediction 
   that for an exhaustive set of outcom es is the ratio of the outcomes that 
   would produce a given event to the total number of possible outcomes 4: a 
   logical relation between statements such that evidence confirming one  
   confirms the other to some degree