This is the 3659th most frequent Spanish word.
nocturna
"Nocturna" means "related to or occurring at night."
The word 'nocturna' is used as an adjective to describe the noun 'vida', meaning 'life', referring to activities that occur during the night.
La vida nocturna de la ciudad es muy vibrante.
The nightlife of the city is very vibrant.
Here, 'nocturna' functions as an adjective modifying 'mariposa', meaning 'butterfly', describing it as being active during the night.
Una mariposa nocturna entró por la ventana.
A nocturnal butterfly entered through the window.
In this example, 'nocturna' is an adjective modifying 'expedición', meaning 'expedition', indicating that it took place at night.