nocturnal

Definition of Nocturnal in English :

1. nocturnal

belonging to or active during the night

Example Sentences:
'nocturnal animals are active at night'
'nocturnal plants have flowers that open at night and close by day'

2. nocturnal

of or relating to or occurring in the night

Example Sentences:
'nocturnal darkness'

WordNet Lexical Database for English. Princeton University. 2010.

Nocturnal

adjective

1.

of, used during, occurring in, or relating to the night

2.

(of animals) active at night

3.

(of plants) having flowers that open at night and close by day

adjective

1.

of, done, or happening in the night

2.

functioning or active during the night

3.

having blossoms that open at night, as some flowers

adj.

1. Of, relating to, or occurring in the night: nocturnal stillness.

2. Botany Opening at night. Used of flowers.

3. Zoology Most active at night: nocturnal lizards.