Quit definition: To exit (an application). To quit means to stop doing something. You might quit a lousy job or quit eating dessert. The verb quit can also mean to leave a place or depart from a location. This meaning isn't used as frequently in conversation now as it used to be, but you can still use it to mean leaving somewhere. You don't have to quit today, but you can start today! Since 2005, Quit Now Virginia has been a leading tool for helping tobacco and nicotine users quit their addiction. QUIT definition: to stop, cease, or discontinue. See examples of quit used in a sentence. QUIT meaning: 1. to stop doing something or leave a job or a place: 2. to stop doing something or leave a job or…. Learn more. Definition of quit verb in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. Some common synonyms of quit are cease, desist, discontinue, and stop. While all these words mean to suspend or cause to suspend activity, quit may stress either finality or abruptness in stopping or ceasing. QUIT definition: 1. to stop doing something or leave a job or a place: 2. to stop doing something or leave a job or…. Learn more. to stop, cease, or discontinue She quit what she was doing to help me paint the house stop, cease, quit, discontinue, desist mean to suspend or cause to suspend activity. stop applies to action or progress or to what is operating or progressing and may imply suddenness or definiteness.