A mordant is a substance used to bond dyes on to a material.

Mordant also may refer to:

Substances Mordant, mixed acid compounds used in metalworking processes, especially etching Mordant, a type of sizing, a substance used for oil-based surface preparation for gilding

Fiction Mordant, a fictional setting of novel series Mordant's Need Mordant, a fictional character from Mighty Morphin Power Rangers: The Movie (1995) "Mordant", a short story by Merab Eberle published in 1930.

See also Mordaunt (disambiguation) Mordent