random variable
nounA random variable is a number that comes from a game of chance, like the total you get when you roll two dice.
In the board game, the random variable for your next move could be any number from one to six.
OTHER MEANINGS
2. In mathematics, a function that assigns a numerical value to each outcome of a random experiment.
The number of heads in ten coin flips is a random variable with a binomial distribution.
3. A quantity whose value is not fixed but depends on chance, often used in modeling and simulation.
The daily temperature forecast treats tomorrow's high as a random variable.
4. In statistics, a variable whose observed values arise from a random process and can be described by a probability distribution.
Researchers recorded the random variable measuring each participant's reaction time.