MARRAM GRASS Meaning of MARRAM GRASS in English [ 'marəm ]■ noun a coarse grass of coastal sand dunes. [ Ammophila arenaria .]OriginC17: from ON marálmr , from marr 'sea' + hálmr 'haulm'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004