1. to watch or monitor someone or something closely, especially for security or law enforcement purposes
Usage: third person singular present tense of ‘surveil’

Examples

• The security team surveils the building 24 hours a day.
• Police surveil suspected criminals to gather evidence.
• The government surveils communications for national security.
• She surveils the playground to ensure children’s safety.
• The detective surveils the suspect’s movements carefully.
• Technology now surveils our online activities constantly.