surveillance.

Systematic observation of people, places, or activities to gather information or monitor behavior.

Use it for

Words that belong together

• electronic surveillance
• surveillance network

On the page

The surveillance network tracked every movement through the corridor.

She noticed the camera only after months of surveillance.

Usage notes

Primary category: sci-fi. Forms: Usually uncountable. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.