watcher

/ˈwɑtʃər/
noun
  1. A person who watches or observes something carefully.
    • A security watcher monitors the cameras all night.
    • She is a dedicated movie watcher who sees every new release.
    • The bird watcher spent hours in the forest with binoculars.
  2. A person who monitors a particular activity or situation, often for a specific purpose.
    • Market watchers predicted a rise in stock prices.
    • The weather watcher reported the approaching storm.
    • Election watchers from other countries observed the voting process.
Antonyms