noun (n)

• the social class between the lower and upper classes

  kelas sosial antara yang lebih rendah dan atas kelas

  Synonym:
  middle class
  

  source: wordnet30
• The French middle class, particularly such as are concerned in, or dependent on, trade.

  perancis kelas menengah, terutama seperti prihatin dalam, atau tergantung pada, perdagangan.

  source: webster1913