nocturnal

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adjective noc·tur·nal \näk-ˈtər-nəl\

Definition of nocturnal

  1. 1 :  of, relating to, or occurring in the night <a nocturnal journey> <nocturnal activities>

  2. 2 :  active at night <a nocturnal predator> <nocturnal insects, such as mosquitoes>

nocturnally

play \-nəl-ē\ adverb

Examples of nocturnal in a sentence

  1. <he bought a new telescope so he could pursue his favorite nocturnal hobby of astronomy>

Origin and Etymology of nocturnal

Middle English, from Anglo-French or Late Latin; Anglo-French nocturnel, from Late Latin nocturnalis, from Latin nocturnus of night, nocturnal, from noct-, nox night


First Known Use: 15th century


NOCTURNAL Defined for English Language Learners

nocturnal

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adjective noc·tur·nal \näk-ˈtər-nəl\

Definition of nocturnal for English Language Learners

  • : active mainly during the night

  • : happening at night


NOCTURNAL Defined for Kids

nocturnal

play
adjective noc·tur·nal \näk-ˈtər-nəl\

Definition of nocturnal for Students

  1. 1 :  happening at night <a nocturnal journey>

  2. 2 :  active at night <nocturnal insects>


Medical Dictionary

nocturnal

play
adjective noc·tur·nal \näk-ˈtərn-əl\

Medical Definition of nocturnal

  1. 1:  of, relating to, or occurring at night <nocturnal myoclonus>

  2. 2:  characterized by nocturnal activity <a nocturnal form of filariasis>



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