agent

noun
B1
OPAL
1
B1
a person whose job is to act for, or manage the affairs of, other people in business, politics, etc.
نماینده, کارگزار, مامور, وکیل
see also estate agent, extension agent, land agent, real estate agent, station agent, travel agent
2
B1
a person whose job is to arrange work for an actor, musician, sports player, etc. or to find somebody who will publish a writer’s work
دلال, کارگزار, واسطه
a theatrical/literary agent
see also literary agent, press agent
3
B1
a person who works secretly to obtain information for a government or other organization
جاسوس
He was arrested by federal agents.
an enemy/undercover agent
CIA/FBI agents
see also double agent, special agent
4
a person or thing that has an important effect on a situation
عامل
The charity has been an agent for social change.
5
a chemical or a substance that produces an effect or a change or is used for a particular purpose
عامل, ماده فعال, ماده تغییردهنده, ماده تأثیرگذار, عامل شیمیایی
chemical/biological agents
cleaning/oxidizing agents
see also nerve agent
6
the person or thing that does an action (expressed as the subject of an active verb, or in a ‘by’ phrase with a passive verb)
عامل
compare patient