How would you define what a camera is?

A camera is a device used for capturing and recording images or videos. It works by capturing light through a lens and converting it into an electronic signal that is stored on a memory card or other storage medium. Cameras can be found in a variety of devices, including smartphones, digital cameras, security cameras, webcams, and many others. They are used for a wide range of purposes, including capturing memories, documenting events, surveillance, scientific research, and artistic expression. There are also many different types of cameras available, such as DSLRs, mirrorless cameras, point-and-shoot cameras, and action cameras, each with their own unique features and capabilities.