A market condition in which purchasers are so few that the actions of any one of them can materially affect price and the costs that competitors must pay.

• 寡头买主垄断一种由少量买方控制的市场状况，由于买主极少，以至于任一买主的行为都有可能极大地影响价格及竞买者所必须偿付的费用