A particular and very popular format of moving image, typically a theatrical narrative recorded on film, edited (typically to a length between 70 and 150 minutes), and released for exhibition in specially built movie theaters, including art house cinemas and multiplexes, and also at homes or in special screenings. Distributed on film reels, and consumer-grade media such as analog VHS magnetic tape, beta magnetic tape, and digital laser disc, DVD, and internet streaming.

Professor John Belton, a professor of English and film at Rutgers University, points out that the first projected images in theaters were not all that large. In a movie palace that might hold 5,000 people, an early screen might have been only 15 feet wide. But the images became larger around the time that sound arrived in the 1930s.
Then, in the 1950s, as Hollywood found itself competing against television, it used special lenses to create movies for screens of expanded width. Marilyn Monroe’s body, in languorous repose, would stretch across screens as wide as 64 feet. This was an intentional shift, Professor Belton says, to “an image that overwhelms the spectator,” part of Hollywood’s campaign “to show the limitations of television.” Later, Hollywood reversed course and began selling to television, though that meant cropping its wide-screen pictures so they would fit on a small screen.
The most glorious attempt to fully engage the theater spectator’s senses was Cinerama, introduced in 1952. Filmed with three cameras outfitted with wide-angle lenses, it used three wide screens, put together in a sumptuous near-semicircle of 146 degrees.
“This gives you a ‘first-person’ experience,” says Thomas Hauerslev, editor of the Web site In70mm. “You see what you’d see if you were sitting where the camera is.” He says IMAX “is not a first-person experience — it’s just big.”
Each frame in Cinerama is 50 percent taller than a regular frame, providing more detail. This makes the cinematic illusion “extremely realistic,” Mr. Hauerslev says.
Cinerama was costly both to film and to exhibit, and its commercial life was short. It was used only for travelogues, except in 1962, when the only two story-centered features were released: “How the West Was Won” and “The Wonderful World of the Brothers Grimm.” The Cinerama name was transferred to a smaller format, and then that format, too, was abandoned.
—NYTimes, Yes, Norma Desmond, the Pictures Are Getting Small Again By RANDALL STROSS, Published: July 7, 2012

Some movies are entirely or make use of animation.

Some scholars suggest that movies originally did not have accompanying soundtracks. This would explain the use of the intertitle in early movies. Bands would usually perform music during the movie, which gave rise to a very specialized form of improvisation and composition specifically for movies. Score for films, while similar in ways to opera and larger ballets, is a new artform for the 1900s.

Interesting movies:
L'Année dernière à Marienbad (released in the UK as "Last Year in Marienbad" and in the USA as "Last Year at Marienbad") is a 1961 French film directed by Alain Resnais, with a very enigmatic plot.

Was Altman the first to make a movie of improvised acting? Goddard?

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