- Law. depending on a contingent event: an aleatory contract.
- of or relating to accidental causes; of luck or chance; unpredictable: an aleatory element.
- Music. employing the element of chance in the choice of tones, rests, durations, rhythms, dynamics, etc.
Origin of aleatory
- dependent on chance
- (esp of a musical composition) involving elements chosen at random by the performer
Word Origin and History for aleatoric
"of uncertain outcome," literally "depending on the throw of a die," 1690s, from Latin aleatorius "pertaining to a gamester," from aleator "a dice player," from alea "a game with dice; chance, hazard, risk; a die, the dice;" perhaps literally "a joint-bone, a pivot-bone," and related to axis.