Quit/kwɪt/ Definition 1 of 5Pro Tip 1/3Voluntary Action Quitting often implies a personal choice to stop doing something. She quit the band to focus on her studies. Pro Tip 2/3Permanent Stop Quitting suggests that you won't start again or return soon. Once I quit caffeine, I slept better. Pro Tip 3/3No Negative Connotation Quitting isn't always bad; it can be positive, such as leaving a harmful habit. He quit lying to his friends and felt relieved.