Definition of "Tuman"

I planted our flag on the Ever White Mountainand watered my horse in the Tuman River.

1965, Inez Kong Pai, transl., The Ever White Mountain: Korean Lyrics in the Classical Sijo Form‎, Rutland, VT: Charles E. Tuttle Company, page 53

“The sun goes down quickly in the north, you know, especially in the winter.” She pauses, remembering the twilight and the sunset in a small border town by Tuman River that separates northern Korea, Manchuria, and Siberia.

1970, Richard E. Kim, Lost Names: Scenes from a Korean Boyhood‎, University of California Press, published 1998, page 3

In this large-scale operation of advance into the homeland we plan to dispatch the KPRA in three directions: The main unit will cross the Amnok River and push towards Hyesan, a strongpoint of frontier guards of the Japanese imperialists; another unit is to skirt Mt. Paektu and push on, by way of Antu and Helong, to the northern border area adjoining the Tuman River; and the third unit is to advance as far as the Linjiang and Changbai areas on the shore of the Amnok River.

1980 , Kim Il-sung, “Let Us Inspire the People with Hopes of National Liberation by Advancing with Large Forces into the Motherland”, in Kim Il Sung Works‎, volume 1, Pyongyang: Foreign Languages Publishing House, page 126

Two-thirds of the region’s 150,000 people inhabit Rajin and Sonbong, many working in Rajin’s port, Sonbong’s oil processing refineries and the iron, magnesium and ceramics industries on the cities’ outskirts. As such, it’s been promoted less for tourists than for businessmen, but even then the zone’s development is taking time, and the Rajin and Sonbong zone, collectively known as Rason, encloses an area of forested hills and wetlands, lakes and the Tuman River delta with an abundance of wildlife.

2008, Robert Willoughby, “Northernmost Corner”, in North Korea (Bradt Travel Guides)‎, 2nd edition, page 186

In 1997, Hwangbo and her family boarded a small boat and crossed the Tuman River, North Korea’s northern border, into China before settling in South Korea.

2018 February 25, Hyung Jin Kim, Christy Lee, “North Korean Ice Hockey Player Who Defected Lauds Effort of Joint Women’s Team”, in Voice of America‎, archived from the original on 25 February 2018