Ottawian adjective 4noun 1forms 3 adjective4 •Pertaining to the National Capital Region of Canada •Synonym of Ottawan; Pertaining to Ottawa •Pertaining to the Ottawa Valley and Ottawa River •Pertaining to the Ottawa Tribe, Language, People, First Nation noun1 •Synonym of Ottawan; A denizen of Ottawa formsOttawians · more Ottawian · most Ottawian