1899 in reference to U.S. foreign policy, "one who advocates a policy of non-participation in foreign affairs" (earlier in reference to treatment of leprosy), from isolation + -ist. As an adjective from 1920. Isolationism is attested in a general sense by 1902; in a U.S. geopolitical sense by 1919 in reference to opposition to joining the League of Nations.
used from c. 1946 in a variety of senses, both by those supporting and those opposed to whatever it was: American intervention in foreign conflicts, a global foreign policy; supremacy of global institutions over national ones; a worldwide extension of capitalist market systems; from global + -ism. Related: Globalist.
abbreviation of National Association for the Advancement of Colored People, first attested 1910. The organization was founded Feb. 12, 1909, as National Negro Committee.
1890 (attested from 1860 as a foreign word), "an expedition over country in East Africa lasting days or weeks," especially for hunting, from Swahili, "journey, expedition," from Arabic, literally "referring to a journey," from safar "journey" (which itself is attested in English as a foreign word from 1858). Used from 1920s of various articles of clothing suitable for safaris.
also m.y.o.b., by 1846, American English slang, an abbreviation of mind your own business. Often in M.Y.O.B. Society, an imaginary organization which a too-inquisitive person would be invited to join.