Hanoian /hɑːˈnɔɪ.ən/noun 2adjective 1forms 1 noun2 •Someone from Hanoi.In his first visit to Vietnam, the U.S. president was welcomed by Hanoians and Saigoneers in ways he's never seen before. — 2016 •A dialect of Vietnamese spoken in and around Hanoi. adjective1 •Of, from, or pertaining to, Hanoi. formsHanoians