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Definition of Conditional probability
1. Noun. The probability that an event will occur given that one or more other events have occurred.
Medical Definition of Conditional probability
1. A probability quoted when the range of choices admitted is restricted, i.e., conditional; thus, the probability of the child of a colour-blind man inheriting the gene is 1/2 if the child is female and almost zero if the child is male. (05 Mar 2000)