Columbian noun 4adjective 3forms 1 noun4 •An inhabitant of any place called Columbia. •(literary, old-fashioned) An American, a person from the United States of America. •A stamp from the Columbian Issue stamps. •(US, old-fashioned) A size of type between English and great primer, standardized as 16-point. adjective3 •Of or pertaining to Christopher Columbus, an explorer who introduced greatly widened contacts between Eurasia and the Americas, or his life or time.This tradition of a colorblind slavery was carried on for a while at the beginning of the Columbian era when white slaves were introduced into the Americas. — 1992 •Of or from any of the places called Columbia. •(literary, old-fashioned) American, from the United States of America. formsColumbians