I go with the FTC's definition: https://www.ftc.gov/advice-guidance/competition-guidance/guide-antitrust-laws/single-firm-conduct/monopolization-defined https:/

I go with the FTC's definition: https://www.ftc.gov/advice-guidance/competition-guidance/guide-antitrust-laws/single-firm-conduct/monopolization-defined https://www.ftc.gov/advice-guidance/competition-guidance/gui... Which uses the term monopoly as shorthand for monopoly power, and they define as "a firm with significant and durable market power"