Dominguan /dɔ.mɪŋ.ən/adjective 1noun 1forms 3 adjective1 •(historical) Of or pertaining to Saint-Domingue or its people (inhabitants).There was no Dominguan currency per se and the livre tournois was officially fixed at 50 per cent above par to attract coinage into the colony. — 1982 noun1 •(historical) A native or inhabitant of Saint-Domingue. formsDominguans · more Dominguan · most Dominguan