quantity, amount, measure - how much there is of something that you can quantify

conditional probability, contingent probability - the probability that an event will occur given that oneor more other events have occurred

cross section - (physics) the probability that a particular interaction (as capture or ionization) will take place between particles; measured in barns

exceedance - (geology) the probability that an earthquake will generate a level of ground motion that exceeds a specified reference level during a given exposure time; "the concept of exceedance can be applied to any type of environmental risk modeling"

fair chance, sporting chance - a reasonable probability of success

fat chance, slim chance - little or no chance of success

joint probability - the probability of two events occurring together

risk of exposure, risk - the probability of being exposed to an infectious agent

risk of infection, risk - the probability of becoming infected given that exposure to an infectious agent has occurred

quality - an essential and distinguishing attribute of something or someone; "the quality of mercy is not strained"--Shakespeare

likelihood, likeliness, odds - the probability of a specified outcome