fitch noun 3verb 1forms 3 noun3 •A polecat, such as the European polecat (Mustela putorius), the striped polecat, steppe polecat, or black-footed polecat of America.Striped fitch has coarser hair and is not so valuable. — 1948 •A skin of a polecat. •A kind of twisted open weave in wickerwork. verb1 •To use this kind of open weave. formsfitched · fitching · fitches