使し用よう中ちゅう

expression, noun which may take the genitive case particle 'no'

in use; occupied; engaged

Indicates that something is currently being used, often seen on signs for toilets, meeting rooms, or equipment.

• トイレのドアに「使し用よう中ちゅう」と書かいてあった。

  The toilet door said 'Occupied'.

• この電でん話わは使し用よう中ちゅうです。

  This phone is in use.