話題 (wadai) means “topic” | MotiTan Japanese Dictionary

More examples

会議では新しい話題を一つ出しました。kai gi de wa atara shi i wa dai o hito tsu da shi ma shi ta

We introduced a new topic in the meeting.

Refers to the matter at the center of what people are saying, discussing, or considering.

議題gidai: A subject or question set for discussion at a meeting.
主題shudai: The main subject or idea of a discussion, work, or event.

人々が話し合ったり関心を向けたりする中心となる事柄。hito bito ga hana shi a tta ri kan shin o mu ke ta ri su ru chū shin to na ru koto gara

話題 (wadai) is a Sino-Japanese compound of 話 (wa, "talk") and 題 (dai, "subject or theme"), linking talk with its subject.

In Japanese, 話題の (wadai no) often describes something widely talked about, such as a film, restaurant, or event, rather than only a discussion subject.