The meaning of STAY UP is to continue to be awake past the time when one usually goes to bed. How to use stay up in a sentence. stay up: something you say in parting, a farewell, means good luck or best of luck , hope things go well originates in the graffiti subculture. refers. The phrase stay up is a versatile expression that can mean remaining awake, alert, current, or steadfast depending on the context. Recognizing the nuances of its usage can enhance your understanding and communication in various situations. What Does Stay Up Actually Mean? Stay up is a common idiomatic phrase used in several contexts, mainly related to staying awake or remain active beyond usual hours. But it's also used in a wider range of situations, which can make understanding it a little tricky at first glance. STAY UP definition: 1. to go to bed later than usual: 2. If a football team stays up, it remains in a division and is…. Learn more. Find 68 synonyms for stay up and other similar words that you can use instead based on 4 separate contexts from our thesaurus. Used other than figuratively or idiomatically: see stay,‎ up. These trousers are too big around the waist. They won't stay up. My plane leaves at 6:00 in the morning, so I plan to stay up until then and sleep on the plane. She stayed up past her bedtime. Shop t-shirts, caps, apparel, and streetwear that inspire a lifestyle of confidence and positivity. stay up (for something) to remain awake and out of bed for some nighttime event. I will stay up for her arrival. I can't stay up that late. Staying up all night isn't ideal, but sometimes it's necessary. When you need to pull an all-nighter, there are steps you can take to maintain your energy and stay alert through the night.