Foyer/ˈfɔɪər/ Definition 1 of 2Pro Tip 1/3First Impression A foyer often reflects the character or function of the building. The marble foyer in the museum echoed its grand exhibits. Pro Tip 2/3Not Outdoors A foyer is always inside the building, not an outdoor space. After the rain started, people gathered in the foyer. Pro Tip 3/3Transition Space A foyer serves as an intermediate space before entering the main area. Guests were asked to wait in the foyer until the event began.