n.a corporation owned by a few people; shares have no public market
同义词：close corporationprivate corporationprivately held corporation
英汉双解大词典
closed corporation
1.
N（名词）
a corporation the stock of which is owned by a small number of persons and is rarely traded on the open market 封闭式公司; 极少在公开市场上交易，股份为少数人所拥有的公司 (See also close corporation) [美国英语]