Hello, you have come here looking for the meaning of the word unsuccessful. In DICTIOUS you will not only get to know all the dictionary meanings for the word unsuccessful, but we will also tell you about its etymology, its characteristics and you will know how to say unsuccessful in singular and plural. Everything you need to know about the word unsuccessful you have here. The definition of the word unsuccessful will help you to be more precise and correct when speaking or writing your texts. Knowing the definition ofunsuccessful, as well as those of other words, enriches your vocabulary and provides you with more and better linguistic resources.