ancestress n a woman ancestor Usage(s) This lady was an ancestress of the artist, embalmed in the family archives as a "sad spinster of 21. This is a family, after all, that has an ancestress who may have murdered her husband and yet is considered a saint by many. Betweenwhiles, the genteel agitation over the ancestress could be excused its lack of drama if it ever had any real gaiety as satire.