Definition of McMahon Line in English:

McMahon Line

(also MacMahon Line, McMahon line)

Pronunciation /məkˈmɑːn lʌɪn/


  • A line proposed by the British under Sir Henry McMahon at the Simla Conference (1913–14) as the frontier between Tibet and Assam, running along the Himalayas from the eastern border of Bhutan to the Brahmaputra River.

    The demarcation was accepted by Tibet, but not recognized by China.


1930s. From the name of Sir (Arthur) Henry McMahon, British foreign secretary to the government of India and commissioner at the Simla Conference + line.