agent

One who exerts power, or has the power to act.

Seeing we are so wonderfully endowed with priceless gifts by our Heavenly Father, will he not require usury at our hands? He will. But he has made us agents to ourselves, which makes us responsible for the way in which we use the talents he has given us, for the manner we expend the gold and silver, the wheat and fine flour, the cattle upon a thousand hills, and the wine and oil, for they all belong to Him

One who acts for, or in the place of, another (the principal), by that person's authority; someone entrusted to act on behalf of or in behalf of another, such as to transact business for them.

He worked as an agent for the government.

I see in him [Moby Dick] outrageous strength, with an inscrutable malice sinewing it. That inscrutable thing is chiefly what I hate; and be the white whale agent, or be the white whale principal, I will wreak that hate upon him.

A person who looks for work for another person and brokers a deal between the hiree and hirer.

Ronald Koeman has agreed a deal with Everton to become their new manager, his agent has reportedly told Dutch media. The agent Rob Jansen said, according to the popular Voetbal International website, that it was now down to Southampton and Everton to agree a compensation package for the Dutchman, who has a year remaining on his contract at St Mary’s.

Someone who works for an intelligence agency: whether an officer or employee thereof or anyone else who agrees to help their efforts (for ideology, for money, as blackmailee, or otherwise).

@Gary, are you a PAP agent? ... =) trying to incite rebellion and revolution on this site so that the govt will have an excuse to take down this site?

An active power or cause or substance; something (e.g. biological, chemical, thermal, etc.) that has the power to produce an effect.

So far seems to be the work of chemistry alone; at least we have no right to conclude that any other agent interferes; since hay, when it happens to imbibe moisture, exhibits nearly the same processes."

Agents are means-rational insofar as they effectively pursue the goals they currently have—but means-rationality (even under a narrow-scope interpretation) does not prohibit agents from changing their goals or dropping them entirely.

A surname.