Success can mean: feeling that tingle of excitement about what you do, sticking with what matters through hard times, living a life you can feel proud of in... Success definition, the favorable or prosperous termination of attempts or endeavors; the accomplishment of one's goals. See more. success meaning, definition, what is success: when you achieve what you want or intend...: Learn more. Success definition is - outcome, result. How to use success in a sentence. Definition of success - the accomplishment of an aim or purpose, the good or bad outcome of an undertaking.