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. Quit definition: To exit (an application). 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. 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. Verb quit (third-person singular simple present quits, present participle quitting, simple past and past participle quit or quitted) (transitive) To leave (a place). 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. 1. To cease an action or cease working properly; stop: The car quit on the hill. 2. To abandon an activity out of frustration or despair; give up: saw that he would never get the part and quit. 3. To resign from or leave a job. Free, customizable quit plan, progress tracker, and craving help to quit smoking or vaping. Access clinically proven behavior change strategies -- kick tobacco & nicotine for good. QUIT definition: to stop, cease, or discontinue. See examples of quit used in a sentence. 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.