映写 (eisha) means “projection” | MotiTan Japanese Dictionary

More examples

古いフィルムの映写が始まりました。furu i fi ru mu no ei sha ga haji ma ri ma shi ta

The projection of an old film has begun.

Refers to projecting a recorded or still image onto a surface for people to view.

投影tōei: The projection of an image, light, or shadow onto a surface.
上映jōei: A public showing of a film or video on a screen.

写真や映画の画像を光でスクリーンなどに投影すること。sha shin ya ei ga no ga zō o hikari de su ku rī n na do ni tō ei su ru ko to

映 (ei, "reflect") combines with 写 (sha, "copy") to form a Sino-Japanese compound meaning the display of a recorded image by projection.

English uses projection for both displaying an image and making a forecast, but 映写 (eisha) refers specifically to displaying an image with light.