1. Noun

   1.

   illness (usu. excluding minor ailments, e.g. common cold); disease; sickness

2. 2.

   bad habit; bad behaviour; weakness; failing

3. Noun which may take the genitive case particle 'no'

   3.

   crazy; insane; disturbed; sick in the head

Example sentences

• トムは病気なの？

  Is Tom ill?