agent

agent /ˈeɪʤənt/ noun
plural agents
agent
/ˈeɪʤənt/
noun
plural agents
Britannica Dictionary definition of AGENT
[count]
1 
: a person who does business for another person : a person who acts on behalf of another
— see also free agent, insurance agent, press agent, real estate agent
2 
: a person who tries to get secret information about another country, government, etc. : spy, secret agent — see also double agent, special agent
3 
: a person or thing that causes something to happen
4 
: something (such as a chemical) that is used to produce a particular effect or result