Concert
A concert (as in a "concert tour") is a performance in which a musician or many musicians play music together to a group of listeners (called an audience). In the case of a concert of classical music there may be an orchestra. There is often an important visual element to the performance, such as with a rock concert. However, if acting out a story is an important part of the performance, then this is called "musical theater" or "opera" but some concerts have dramatic, theatrical music, with lights and special effects. Informal names for a concert include "show" or sometimes, "gig" for musicians who play in lots of different concerts, with different groups. A concert tour is a set of concerts where the performers travel to different cities or towns.