counterespionage

noun coun·ter·es·pi·o·nage \ˌkau̇n-tər-ˈes-pē-ə-ˌnäzh, -ˌnäj, -nij, Canada also -ˌnazh; -ˌes-pē-ə-ˈnäzh; -ə-ˈspē-ə-nij\

: the activity of preventing or stopping enemies from spying

Full Definition of COUNTERESPIONAGE

: the activity concerned with detecting and thwarting enemy espionage

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1899

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