5 definitions
Definition.com
Antitrust (n.) is the government reminding a monopoly it exists, briefly.
Definition.com
Antitrust (n.) is competition's lawyer, retained by the losers.
Definition.com
Antitrust (n.) is the law that stops a company from buying its competitors, until it hires the right lawyers.
Definition.com
Antitrust (n.) is the government reading the fine print of a deal everyone else has already celebrated.
Definition.com
Antitrust (n.) is a referee who shows up after the game to negotiate the score.