Aleatory/ˈeɪliətɔːri/ Definition 1 of 3Pro Tip 1/2Life's Uncertainty Use 'aleatory' to describe the unpredictable nature of life and events. Entrepreneurs often embrace the aleatory challenges of starting a business. Pro Tip 2/2Unexpected Results 'Aleatory' suggests outcomes are out of our control and governed by luck. Despite her preparations, the results of the competition remained aleatory.