observer
🇺🇸
/əbˈzɜːrvər/
🇬🇧
/əbˈzɜːvə(r)/
someone who watches something or someone
The observer watched the birds in the park.
someone who attends an event to watch and listen but not participate
The observer sat quietly during the meeting.
an expert who watches and studies events to understand them
The weather observer recorded daily temperatures.