nocturnal   (Sound)

The nocturnal has 2 Senses.

• nocturnal
• belonging to or active during the night; "nocturnal animals are active at night"; "nocturnal plants have flowers that open at night and close by day"
• 夜に活動的でそれに属する

• nocturnal
• of or relating to or occurring in the night; "nocturnal darkness"
• 夜の、夜に関する、または、夜に起こる