noun ·6 syllables ·Rare ·Advanced level

Definitions

Noun

1. 1
   All those activities undertaken to neutralize or exploit the espionage activities of another nation or an enemy. uncountable
2. 2
   spying on the spies wordnet

Synonyms

All synonyms

counterintelligencebuggingcloak-and-dagger workcounterintelligenceelectronic surveillanceespial

Etymology

From counter- + espionage.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.