1. Noun, Noun which may take the genitive case particle 'no'

   1.

   division (of a larger group); branch; field; class (subclass)

Example sentences

• 代数は数学の１部門です。

  Algebra is a branch of mathematics.

• 小売部門は厳しい四半期を迎えた。

  The retail sector had a rough quarter.