observer
n.-
1 someone who watches (n.) B2 Upper Intermediatea person who watches or notices something carefully.
an individual who monitors or takes notice of events, often to gain information or understanding.
ExampleA casual observer might not notice the small changes in the painting.
ExampleTo a trained observer, the subtle shifts in the bird's behaviour indicated that a predator was likely nearby in the tall grass.
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2 official monitor (n.) B2 Upper Intermediate Formala person sent to a meeting or election to watch but not take part.
a representative delegated to attend a function or monitor a process to ensure fairness or gather data without active participation.
ExampleInternational observers were sent to make sure the election was fair.
ExampleThe organization sent several observers to the climate summit to report back on the progress of the negotiations without joining the voting process.
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3 military lookout (n.) C1 Advanced Technical Militarya soldier or crew member who watches for enemy positions.
a person, such as a sentry or aircraft crew member, tasked with spotting enemy movements or identifying targets.
ExampleThe observer used binoculars to scan the horizon for enemy ships.
ExampleThe forward observer relayed the exact coordinates of the artillery fire to the command centre via a secure radio link.
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4 follower of rules (n.) C2 Proficiency Formal Religionsomeone who follows a law, custom, or religious tradition.
one who adheres to or complies with laws, guidelines, or religious requirements.
ExampleHe was a strict observer of the Sabbath and never worked on Saturdays.
ExampleAs a lifelong observer of traditional customs, she insisted that the ceremony be performed exactly as it had been for generations.
- adherent
- follower
From observe + -er.