Theatre or theater is a collaborative form of fine art that uses live performers, typically actorsor actresses, to present the experience of a real or imagined event before a live audience in a specific place, often a stage. The performers may communicate this experience to theaudience through combinations of gesture , speech , song , music , anddance . Elements of art , such as painted scenery and stagecraft such as lighting are used to enhance the physicality, presence and immediacy of the experience . The specific place of the performance is also named by the word "theatre" as derived from the Ancient Greek θέατρον (théatron, "a place for viewing"), itself from θεάομαι (theáomai, "to see", "to watch ", "to observe").
Modern Western theatre comes, in large measure, from ancient Greek drama , from which it borrows technical terminology, classification into genres, and many of its themes, stock characters, and plot elements. Theatre artist Patrice Pavis defines theatricality, theatrical language , stage writing and the specificity of theatre as synonymous expressions that differentiate theatre from the other performing arts , literature andthe arts in general.
Modern theatre includes performances of plays and musical theatre . The art forms of balletand opera are also theatre and use many conventions such as acting , costumes and staging. They were influential to the development of musical theatre ; see those articles for more information .