Sooner or later Definition 1 of 1Pro Tip 1/3Future Certainty Used to express that something will definitely happen, but the timing is uncertain. She'll realize her mistake sooner or later. Pro Tip 2/3Inevitability Highlights that an event is bound to occur at some point, no matter what. Sooner or later, the truth will come out. Pro Tip 3/3Patience Implication Implies that patience is necessary because the outcome is uncertain in time. You'll get your chance sooner or later—just wait.