1. a person who secretly watches or gathers information about others, especially for a government or organization

1. to watch secretly or gather information covertly
2. to catch sight of or notice

Examples

• The government recruited him as a spy during the war.
• She worked as a spy for the intelligence agency.
• I think someone is trying to spy on our meeting.
• The detective decided to spy on the suspect’s activities.
• Can you spy the lighthouse from here?
• I spy with my little eye something that is red.
• The children played spy games in the backyard.