Noun probability has 2 senses
  1. probability, chance - a measure of how likely it is that some event will occur; "what is the probability of rain?"; "we have a good chance of winning"
    --1 is a kind of measure, quantity, amount
    --1 has particulars:
     conditional probability, contingent probability; cross section; exceedance; fair chance, sporting chance; fat chance, slim chance; joint probability; risk, risk of exposure; risk, risk of infection
  2. probability - the quality of being probable
    --2 is a kind of
    Antonyms: improbability, improbableness
    --2 has particulars: likelihood, likeliness, odds