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. 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. to stop, cease, or discontinue She quit what she was doing to help me paint the house Quit definition: To exit (an application). To quit means to stop doing something. You might quit a lousy job or quit eating dessert. 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. 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 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. QUIT definition: to stop, cease, or discontinue. See examples of quit used in a sentence. Verb quit (third-person singular simple present quits, present participle quitting, simple past and past participle quit or quitted) (transitive) To leave (a place).