The adj foreign has 4 senses (first 4 from tagged texts)
1. (21) foreign -- (of concern to or concerning the affairs of other nations (other than your own); "foreign trade"; "a foreign office")
2. (10) foreign, strange -- (relating to or originating in or characteristic of another place or part of the world; "foreign nations"; "a foreign accent"; "on business in a foreign city")
3. (4) alien, foreign -- (not contained in or deriving from the essential nature of something; "an economic theory alien to the spirit of capitalism"; "the mysticism so foreign to the French mind and temper"; "jealousy is foreign to her nature")
4. (1) extraneous, foreign -- (not belonging to that in which it is contained; introduced from an outside source; "water free of extraneous matter"; "foreign particles in milk")