quitquit /kwɪt/ verb (past tensepst and past participlepp quit also quitted British EnglishBrE, present participle quitting) [intransitiveI, transitiveT]1informal to leave your job, especially because you are annoyed or unhappy with itSome people quit after only a few months in the job.
He quit a management training job at Sears.
2COMPUTINGto close a computer program when you have finished using itTo shut the machine down, quit Windows and then switch off the machine.