1The middle class; a socio-economic group positioned between the lower and upper classes, typically having stable income, purchasing power, and certain educational or occupational standards.
中産階級の家庭は教育にお金をかける傾向がある。
Middle-class families tend to spend money on education.
戦後、日本では中産階級が拡大した。
After the war, the middle class in Japan expanded.