Definition of tint - iDigitalPhoto Dictionary. Definition: Noun: (1) colour reproducible with process colours; a process colour. (2) An overall, usually light, colouring that tends to affect areas with density but not clear areas (in contrast to a colour cast). (3) Colour produced by adding white to the hue. (4) A deposit or imprint of less than the maximum amount of ink e.g. in photomechanical reproduction: any dot less than 100%.