Definition of "colorize"

colorize

verb
third-person singular simple present colorizes, present participle colorizing, simple past and past participle colorized
1. To add color to.
2. (photography, cinematography) To convert black and white media to color by digital post production (as is often done in digital photography and in video special effects).
  Quotations
  What we see are beautiful overlapping NASA satellite photographs of the American mainland, […] taken in black and white and then luminously colorized by computer for scientific reasons.
  1988 August 26, Jonathan Rosenbaum, “Looking for America”, in Chicago Reader‎