Definition of nocturnal
- a nocturnal journey
- nocturnal activities
- a nocturnal predator
- nocturnal insects, such as mosquitoes
he bought a new telescope so he could pursue his favorite nocturnal hobby of astronomy
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'nocturnal.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: active mainly during the night
: happening at night
What made you want to look up nocturnal? Please tell us where you read or heard it (including the quote, if possible).
Words Used by Nabokov Quiz
Can you spell these 10 commonly misspelled words?TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.TAKE THE QUIZ