Antitrust

[Sarah]

An abuse of power or authority over a market to prevent [consumers] from buying or using the product or service of a competitor. See [conflict of interest] and [monopoly].

[Julene]

(of legislation, chiefly in the US) preventing or controlling trusts or other monopolies, and so promoting fair competition in business.

[Ernesto]

Relating to legislation preventing or controlling trusts or other monopolies, with the intention of promoting competition in business.