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Definition: camera

(1) A rear- or front-facing component in a smartphone or tablet that captures digital still and moving images. See rear-facing camera, video calling and Webcam.

(2) A stand-alone device that records still or moving images as analog scenes on film or as pixels in digital storage. Movie cameras, which are called "camcorders," also include a microphone for audio capture. The world of photography and movie making has migrated from film (analog) to digital, and all digital cameras can play back the recorded material on a small, built-in LCD screen. See digital camera, point-and-shoot camera, POV camera, DSLR and camcorder.

Not Exactly Digital
Film cameras like these were used to take millions of pictures in the first half of the 20th century. See film camera.