noun

• (computing) A file that contains all information needed to produce a live working copy. (See disk image and image copy.)
  "Most game console emulators do not come with any ROM images for copyright reasons."
• (mathematics) The value a function maps some argument to.
  "The number 6 is the image of 3 under f that is defined as f(x) = 2x."
• (mathematics) The subset of the codomain of a function comprising those elements that are the image of some element of its domain.
  "The image of this step function is the set of integers."
• (radio) A form of interference: a weaker "copy" of a strong signal that occurs at a different frequency.

verb

• (transitive) To represent by an image or symbol; to portray.
  "1718, Alexander Pope, The Iliad of Homer, London: Bernard Lintot, Volume IV, Observations on the Fifteenth Book, Note 14 on verse 252, p. 215, This Representation of the Terrors which must have attended the Conflict of two such mighty Powers as Jupiter and Neptune, whereby the Elements had been mix’d in Confusion, and the whole Frame of Nature endangered, is imaged in these few Lines with a Nobleness suitable to the Occasion."
• (transitive) To reflect, mirror.
  "See’st thou yon river, whose translucent wave, Forth issuing from the darkness, windeth through The argent streets o’ th’ City, imaging The soft inversion of her tremulous Domes,"
• (transitive) To create an image of.
  "The single-imaging optic of the mammalian eye offers some distinct visual advantages. Such lenses can take in photons from a wide range of angles, increasing light sensitivity. They also have high spatial resolution, resolving incoming images in minute detail."
• (transitive, computing) To create a complete backup copy of a file system or other entity.