Original: In computer engineering, out-of-order execution, OoOE, is a paradigm used in most high-performance microprocessors to make use of cycles that would otherwise be wasted by a certain type of costly delay.
Simplified: In computer engineering, out-of-order execution, OoOE, is a technique used in most high-performance microprocessors to make use of cycles that would otherwise be wasted by a certain type of costly delay.