The definition of stochastic is random or involving chance or probability.(adjective)
When the order of events is randomly determined and it cannot be predicted what will come first, second or third, this is an example of when the order of events would be described as stochastic.
See stochastic in Webster's New World College Dictionary
Origin: < Gr stochastikos, proceeding by guesswork, lit., skillful in aiming < stochazesthai, to aim at < stochos, a target: for IE base see sting
See stochastic in American Heritage Dictionary 4
Origin: Greek stokhastikos
Origin: , from stokhastēs, diviner
Origin: , from stokhazesthai, to guess at
Origin: , from stokhos, aim, goal; see stegh- in Indo-European roots.
Learn more about stochastic