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)

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

Oct 16, 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, …

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

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.

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 practice of spying has a long history, dating back to ancient times when spies were used for military and political purposes. Today, spying is often associated with intelligence agencies …

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.

Sep 11, 2025 · Spies might seem like a throwback to earlier days of world wars and cold wars, but they are more common than ever—and they are targeting our nation’s most valuable secrets. …