English adjective: nocturnal | |||
| 1. | nocturnal belonging to or active during the night | ||
| Samples | Nocturnal animals are active at night. Nocturnal plants have flowers that open at night and close by day.  | ||
| Domain category | biological science, biology | ||
| Antonyms | diurnal | ||
| 2. | nocturnal of or relating to or occurring in the night | ||
| Samples | Nocturnal darkness. | ||