1638, from L. vividus "spirited, animated, lively," from vivus "alive," from PIE *gwei- (see vital). Extension to colors is first recorded 1665. Sense of "strong, distinct" (as of memories, etc.) is from 1690; that of "very active or intense" (as of imagination, interest, etc.) is from 1853.
A numerical constraint-oriented language. ["VIVID: The Kernel of a Knowledge Representation Environment Based on the Constraints Paradigm of Computation", J. Maleki, Proc 20th Annual Hawaii Intl Conf on System Sciences (Jan 1987) pp.591-597]. (1995-02-23)