Bostonian /bɒsˈtəʊniən/adjective 2noun 2forms 1 adjective2 •Related to, characteristic of, or residing in Boston, Massachusetts.Bostonian fashions are reserved, even dull, when compared to California style. •Related to, characteristic of, or residing in Boston, Lincolnshire. noun2 •A person who was born in or who lives in Boston, Massachusetts.Bostonians eagerly await the arrival of spring after a long, cold, snowy winter. •A person who was born in or who lives in Boston, Lincolnshire. formsBostonians