MON Meaning of MON in English [ mɔ:n ]■ noun ( plural same or ~s ) 1》 a member of a people inhabiting parts of SE Burma (Myanmar) and western Thailand. 2》 the language of the ~, related to Khmer.Originthe name in ~. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004