Stay in Definition 1 of 5Pro Tip 1/3Casual Evenings Used for informal, relaxed evenings when choosing not to attend events. After a tiring week, they preferred to stay in and unwind. Pro Tip 2/3Choice of Comfort Expresses preference for the comfort of one's home over going out. It's cold outside, let's stay in and have hot cocoa. Pro Tip 3/3Conveys Routine Can indicate a regular habit or routine of not going out. She likes to stay in and read books every Friday night.