The Chinese word "Mėng" is composed of two roots "mouth" and "order" . So literally it means giving verbal order. And from this is deduced threefold meanings:
1) Order / Giving Order -
(i) A feudal lord giving order to his subordinates. Also;
(ii) Nominate (someone to a certain position), and furthermore;
(iii) Give a name to someone [NB. In ancient China, people were usually surnamed by the fiefdom they were presented];
2) Destiny as ordained by Heaven at one's birth. [NB. See also glossary on "mėngyųn"];
3) Life / lifespan (which is subsequently determined by our destiny) [NB. See also glossary on "xėngmėng"].