private company; private corporation
A company that is privately owned and operated, as opposed to a public or government entity.
He works for a major private company.
Similar meaning, but 民間企業 is slightly broader and more formal, often used in economic contexts.
Also means private enterprise, but 私企業 is less common and can sound more technical.
Compound of 民間 (private, civilian) + 会社 (company).