A journey or trip for pleasure in which several different places are visited. They went on a tour of Europe last summer.
A short trip through a place to see it, especially with a guide. We took a tour of the museum to learn about its history.
A series of performances, exhibitions, or other events held in different places. The band is on a world tour to promote their new album.
A period of time spent in a particular role or place, especially in the military. He completed a tour of duty in the Middle East.