Espionage, spying, or intelligence gathering, as a subfield of the intelligence field, is the act of obtaining secret, confidential, or in some way valuable information.

Phrasal verb spy on someone/something (Definition of spying from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

Espionage is defined as the act of spying or using spies, agents, assets, and intelligence officers, as well as technology, to collect secret information, usually through illegal means.

The meaning of SPY is to watch secretly usually for hostile purposes. How to use spy in a sentence.

Nov 7, 2025 · In 1962 the Soviet Union began to secretly install missiles in Cuba to launch attacks on U.S. cities. The confrontation that followed, known as the Cuban missile crisis, brought the two …

1. To engage in espionage. 2. To investigate or observe something, especially in secret: spying into the neighbor's activities.

Jun 16, 2025 · Discover 25 intriguing facts about the concept and history of spying, from ancient espionage tactics to modern intelligence operations.

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Spying is the act or process of finding out secret information for a country or organization about other countries or organizations. ...a ten-year sentence for spying.

Spying is a tense and often deadly way for governments to gather secret information from their enemies. Learn how spies are recruited and how they obtain information.