agent
//ˈeɪ.dʒənt//
Noun
agentSingular
agentsPlural
1
A person who acts on behalf of another person or organization, representing their interests
She hired an agent to negotiate the contract on her behalf.
2
A spy or secret operative working for a government or intelligence agency
The agent was sent to gather intelligence in a foreign country.
3
A person or company that provides a particular service, especially by arranging transactions between buyers and sellers
We hired a real estate agent to help us find a new apartment.
4
A substance or force that produces a particular effect or change
Bleach is a powerful cleaning agent that removes stains.
5
In grammar, the person or thing that performs the action of a verb
In the sentence 'The cat chased the mouse,' 'the cat' is the agent.