verb
- watching someone or something closely, especially for security or investigation purposes
Usage: present participle of surveil
Examples
- The police were surveilling the suspect’s house for weeks.
- Security cameras are surveilling the parking lot 24 hours a day.
- Federal agents spent months surveilling the criminal organization.
- The detective was surveilling the warehouse from across the street.
- They discovered someone had been surveilling their movements.
- The company was accused of surveilling its employees’ internet activity.