noun, noun, used as a suffix
piece of music; song; track; composition
The everyday word for a musical piece, including songs, instrumental works, and tracks on an album. Also used as a suffix for counting or listing pieces, as in 一曲 or 三曲目.
この曲を初めて聞いたとき、すぐ好きになった。
When I first heard this song, I liked it right away.
アルバムには十曲入っている。
The album contains ten tracks.
noun
Refers to the musical tune or melody itself, especially in contrast with words, lyrics, or a text being set to music.
彼女はその詩に曲を付けた。
She set the poem to music.
歌詞はまだないが、曲はもうできている。
There are no lyrics yet, but the tune is already finished.
noun
Rare and old-fashioned use meaning charm, interest, or amusing quality. It is most safely understood in fixed or literary-looking expressions such as 曲がない or 曲のない, rather than as a common modern standalone noun.
古い文章では、「曲のない話」が面白みのない話を指すことがある。
In older writing, 曲のない話 can mean an uninteresting story.