MONOPSONY Meaning of MONOPSONY in English [ mə'nɒpsəni ]■ noun ( plural monopsonies ) Economics a market situation in which there is only one buyer.Origin1930s: from mono- + Gk opsōnein 'buy provisions' + -y 3 . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004