agent
Definitions
A person who acts on behalf of another person or group.
A person or thing that takes an active role or produces a specified effect.
A representative of a business or government agency.
Examples
The real estate agent helped us find the perfect home in our price range.
The secret agent went undercover to gather intelligence on the enemy organization.
A travel agent can often secure better deals on flights and hotels than you can find online.
Synonyms
representative proxy delegate envoy broker intermediary deputy