The foremost variance between theater and theatre is how they are used. Theater is the American spelling of the name, while theatre is the British spelling. The traditional spelling of the word is theatre. Both refer to a building in which there are shows, plays, singing, and dancing, and dramatic performances ensue.
The term theatre is still used in British English today. The term came from the city of Athens, as a result of what can only be described as a boom in a performance culture. Theater is the modern spelling of the word, as it usually refers to a place where motion picture films are shown on a big screen in front of a live audience. Centuries ago, the theatres could host between ten to twenty thousand people. The term theater was originally used in France in the 14th century.
The main distinction between theater and theatre is that theater is the American spelling of the word, while theatre is the British spelling. Theatre is the more traditional spelling of the word, as it is even older than the theatre itself. Both words possess the same meaning, which is a building or an area that plays films, and musicals or plays are enacted.
It can also relate to the profession of writing acting or directing plays. Both theatre and theater are considered as art forms. The main difference is their usage, and theatre is said to have originated in Greece, while theater is said to have originated in France.