anathema noun anath·e·ma \ə-ˈna-thə-mə\ definition of anathema: a : a ban or curse solemnly pronounced by ecclesiastical authority and accompanied by excommunication b : the denunciation of something as accursed c : a vigorous denunciation : curse // this is a boyxboy story between isaac lahey and alec lightwood. also this got a lot darker than i thought it would so this is a general warning !! its cute and romantic and is set in season 3b of teen wolf