agent

B1 · Intermediate Countable noun

n. a person who works for a government's secret service or a specific police department.

n. an official employed by a government intelligence agency or a specialized law enforcement department.

日本語:エージェント※

“In the movie, the secret agent had to stop a dangerous criminal.”

“Federal agents conducted a coordinated raid on the warehouse after months of surveillance and undercover work.”

B2 · Upper Intermediate Countable noun Science Technical

n. a chemical or biological substance that causes a specific effect or change.

n. a substance or force that produces a biological, chemical, or physical effect.

“Soap is a cleaning agent that helps remove grease from your hands.”

“The researchers identified a specific chemical agent in the soil that was preventing the local crops from growing properly.”

C1 · Advanced Countable noun Computing Technical

n. a computer program that acts on your behalf to perform tasks automatically.

n. an autonomous or semi-autonomous computer program that performs tasks on behalf of a user or another program.

“The smart software agent finds the cheapest flights for you automatically.”

“Intelligent agents within the network monitor traffic patterns to optimize data routing and prevent server congestion during peak hours.”

C1 · Advanced Countable noun Grammar Academic · Technical

n. the person or thing in a sentence that performs the action.

n. the semantic role of the entity that instigates or performs the action of the verb.

“In the sentence 'The chef cooked the meal', the chef is the agent.”

“In passive constructions, the agent is often expressed in a prepositional phrase starting with 'by' or is omitted entirely.”