A visitor is someone who comes to see a person or place for a temporary period of time. When your grandmother drives three hours to spend the weekend at your house, she's a visitor. When a new student shadows your class for a day to see if they want to enroll, they're a visitor. When tourists from another country explore the Grand Canyon, they're visitors too.

The word emphasizes that the person doesn't live or belong permanently in the place they're visiting. Your home has residents (the people who live there) and visitors (guests who come and go). A hospital has patients, staff, and visitors. A museum has curators who work there every day and visitors who come to see the exhibits.

Schools often give visitors special badges so everyone knows they're supposed to be there but aren't regular students or teachers. This helps keep everyone safe while still welcoming guests.

The verb form is visit, meaning to go see someone or someplace. You might visit your cousins over summer break, visit a historical site on a field trip, or visit the library after school. When you're the one doing the visiting, you're the visitor.