armorial adjective 2noun 1forms 1 adjective2 •Of, or relating to heraldry, or to heraldic arms.The Metropolitan District Railway did not at any time employ an armorial device on its rolling stock, though one was frequently displayed on its maps and timetables. — 1950 •(rare) In, or pertaining to, armor. noun1 •A book etc concerning heraldry, especially a collection of coats of arms. formsarmorials
