The reverse side of the Great Seal of the United States (1776). The Latin phrase "novus ordo seclorum", appearing on the reverse side of the Great Seal since 1782 and on the back of the U.S one-dollar bill since 1935, means "New Order of the Ages" and only alludes to the beginning of an era where the United States of America is an independent nation-state, but is often mistranslated by conspiracy theorists as "New World Order".^[1]

In conspiracy theory, the term New World Order or NWO refers to the emergence of a bureaucratic collectivist one-world government.^{[2][3][4][5][6]}

The common theme in conspiracy theories about a New World Order is that a secretive power elite with a globalist agenda is conspiring to eventually rule the world through an authoritarian world government — which replaces sovereign nation-states — and an all-encompassingpropaganda that ideologizes its establishment as the culmination of history's progress.  Read more here 

http://en.wikipedia.org/wiki/New_World_Order_(conspiracy_theory)