To render more liquid; make thin or more fluid, as by mixture of a fluid of less with one of greater consistence; attenuate the strength or consistence of: often used figuratively: as, to dilute a narrative with weak reflections.Hence To weaken, as spirit or an acid, by an admixture of water or other liquid, which renders the spirit or acid less concentrated.To make weak or weaker, as color, by mixture; reduce the strength or standard of.To become liquid or more liquid; become thin or reduced in strength: as, vinegar dilutes easily.Thin; attenuated; reduced in strength, as spirit or color.Weak; paltry; poor.