nineteenth /ˌnaɪnˈtiːnθ/noun 2adjective 1forms 1 noun2 •The person or thing in the nineteenth position. •One of nineteen equal parts of a whole. adjective1 •The ordinal form of the number nineteen.Images of Dutchness in American visual culture and literature during the nineteenth century differed radically between portrayals of the Netherlands Dutch and those of the American Dutch. — 2009 formsnineteenths