Noun Definitionstigma1.Definition: a skin lesion that is a diagnostic sign of some diseaseCategory: General2.Definition: a symbol of disgrace or infamyRelated Noun(s):brand, mark, stainCategory: General3.Definition: an external tracheal aperture in a terrestrial arthropodCategory: General4.Definition: the apical end of the style where deposited pollen enters the pistilCategory: Plants