Sumatran

1 of 2

adjective

Su·​ma·​tran -rən How to pronounce Sumatran (audio)
1
: of, relating to, or characteristic of the island of Sumatra
2
: of, relating to, or characteristic of the people of Sumatra

Sumatran

2 of 2

noun

"
plural -s
: a native or inhabitant of Sumatra

Word History

Etymology

Adjective

Sumatra, island in Indonesia + English -an

Cite this Entry

“Sumatra.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Sumatra. Accessed 18 Jun. 2026.

Geographical Definition

Sumatra

geographical name

Su·​ma·​tra su̇-ˈmä-trə How to pronounce Sumatra (audio)
island of western Indonesia south of the Malay Peninsula area 182,542 square miles (472,784 square kilometers)

Note: The Equator divides Sumatra into two almost equal parts.

Sumatran adjective or noun

More from Merriam-Webster on Sumatra

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster