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. Spying is a tense and often deadly way for governments to gather secret information from their enemies The meaning of spy is to watch secretly usually for hostile purposes
The naked neighbor next door isn't breaking the law
How to use spy in a sentence.
Phrasal verb spy on someone/something (definition of spying from the cambridge advanced learner's dictionary & thesaurus © cambridge university press)
How do spies communicate secretly with their home countries Who was the most famous spy in history and what did they do What tools and gadgets do real spies use compared to movie spies How did espionage change during the cold war
What is the difference between a spy and an intelligence officer? The days of cloak and dagger spying look a bit different in the digital age But the spy business itself is busy — and getting busier.