1. people who observe or monitor something carefully
Usage: plural of watcher
2. people who keep guard or maintain surveillance
Usage: security context

Examples

• The bird watchers gathered at dawn with their binoculars.
• Security watchers monitored the building throughout the night.
• Weight watchers often track their daily food intake.
• The watchers reported suspicious activity to the authorities.
• Storm watchers predicted severe weather conditions.
• The watchers kept a close eye on the children at the playground.