A question or doubt; something uncertain or a point of suspicion; also a query or problem to be examined.
その説明にはまだ疑問が残る。
There are still doubts remaining about that explanation.
子供が「どうして？」と何度も疑問を投げかけた。
The child asked “why?” many times, raising questions.
この問題は鋭い議論と多くの疑問を呼んでいる。
This issue has provoked sharp debate and many questions.