alarum n. + Add to list UK //ɐlˈɑːɹəm// alarum Archaic SynonymsEtymology Synonyms alarmalertOriginLATarma, armorum→ROA-OITall'arme→MEalarom→ENalarum From Middle English alarom, from Old Italian all'arme (“to arms, to the weapons”), from Latin arma, armorum (“weapons”).