Englishfor English speakers
foreign
Adjective
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Foreign means something that comes from a different place or country. Foreign people are known as foreigners.
Sven has a foreign accent.
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Foreign can mean something that is not familiar or not characteristic.
Greed was as foreign to him as a Frenchman in China.
counterintelligence
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noun
intelligence activities concerned with identifying and counteracting the threat to security posed by hostile intelligence organizations or by individuals engaged in espionage or sabotage or subversion or terrorism