/ˌɒlɪˈɡɒpəli/ – Noun
Definition: Tình trạng thị trường chỉ có một số ít doanh nghiệp chiếm lĩnh và kiểm soát thị trường.
A more thorough explanation: a market form in which a market or industry is dominated by a small number of companies or undertakings
Example: The private health care insurance industry is often an oligopoly, with only a few companies controlling the marketplace.