conservant adjective 1noun 1forms 3 adjective1 •Having the power or quality of conservation; conserving.Now, besides these laws, the body is subjected also to the laws of vitality, and the coexistence of these destructive and conservant forces can clearly be recognized. — 1875 noun1 •A substance that is used for the purpose of conserving; a preservative.The total number of microorganisms was increased slightly in feces kept without conservant, mainly on account of the aerobic group. — 1969 formsconservants · more conservant · most conservant