monopolist

/məˈnɑpəlɪst/
noun
  1. A person or company that has complete control over the supply of a product or service in a particular market, with no competition.
    • The local cable company is a monopolist, so residents have no choice but to pay high prices.
    • In the early 1900s, John D. Rockefeller was a famous monopolist in the oil industry.
    • The government broke up the monopolist to allow smaller businesses to compete.
  2. A person who dominates a particular activity or resource, preventing others from sharing it.
    • In the playground, the child acted like a monopolist of the swings, not letting anyone else use them.
    • She's a monopolist of the office printer, always hogging it for her own projects.
    • He became a monopolist of the conversation, talking for an hour without letting others speak.
Antonyms
What does "monopolist" mean? | whatsthatwordmean | whatsthatwordmean