Alsatian /ælˈseɪʃən/noun 3adjective 1forms 2 noun3 •A native or inhabitant of Alsace (now part of the administrative region of Grand Est, France). •(UK, old-fashioned) A German shepherd dog. •(UK, no longer used) A rogue or debauchee, like those who haunted Alsatia in London.You shall sink a nobleman in the Temple Gardens, and rise an Alsatian at Whitefriars. — 1822 adjective1 •Of, from or relating to Alsace (now part of the administrative region of Grand Est, France).[...] while the 7 p.m. is the fastest locomotive-hauled train to Strasbourg reaching the Alsatian capital (313 miles) in 4hr 11min [...]. — 1962 formsAlsatians · alsatians