1. Noun

   1.

   topic; subject

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

   2.

   much talked about; topical; in the news; hot

3. Wikipedia definition

   3.

   Topic–comment

Example sentences

• 彼女は話題を変えた。

  She changed the subject.

• そろそろ話題変えない？

  I think it's about time we change the subject.