The crossword solution for the term PLAYPEN is ENCLOSURE, which is a nine-letter word. An ENCLOSURE is a structure or area that is surrounded by a fence or wall in order to keep something or someone in or out. A playpen is an ENCLOSURE specifically designed for children to play in, usually made of mesh or plastic and often with a floor pad. It is used to provide a safe and secure environment for children to play in while still allowing them to be supervised.