countermand n. + Add to list UK //kˈaʊntəmˌænd// coun·ter·mand Archaic SynonymsEtymology Synonyms annulliftoverturnrepealrescindreverserevokevacateOriginLA-MEDcontramandō→OFRcontremander→ENcountermand From Old French contremander, from Medieval Latin contramandō, from contra + mandō (“I order; I command”).