When a sign on a door or a fence reads "keep out," what other words could be used to convey the same message? "Stay away" is one option, with the added implication of potential danger being present. "Do not enter" is another common synonym, usually seen in places where a warning is necessary for safety reasons. "Restricted area" is a phrase that may be used when the space is off-limits due to security or privacy concerns. "No trespassing" is often used to protect property owners from unwanted visitors. Ultimately, the meaning behind "keep out" can be conveyed using several phrases, but the underlying message is the same: this area is not open to the public.