How do you reset a hitachi tv. Definition of do 1 verb from the Oxford Advanced Learner's Dictionary. Accomplish and achieve both connote successful completion of an undertaking. To behave or conduct oneself; act: Do as I say and you won't get into trouble. Are you doing anything tomorrow evening? The company ought to do something about the poor service. … Do, accomplish, achieve mean to bring some action to a conclusion. ). What are you doing this evening? We will do what we can to help. 1. Do is the general word: He did a great deal of hard work. It's one of the most common verbs in English, used in a wide range of contexts, from simple tasks to complex actions.