Visitor/ˈvɪzɪtər/ Definition 1 of 5Pro Tip 1/3Social Visitor Refers to casual or social visits, can be unplanned or unexpected. I enjoy being a visitor at my friends' houses. Pro Tip 2/3Not Always Welcome Visitors aren't always welcome; 'unexpected visitor' can imply intrusion. The family was surprised by an unexpected visitor during dinner. Pro Tip 3/3Visitor Centre A facility providing info and services to assist visitors, typically in tourism. We stopped at the visitor center for maps and recommendations.