UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/nɒkˈtɜːrnəl/US:USA pronunciation: IPA and respellingUSA pronuncation: IPA/nɑkˈtɝnəl/ ,USA pronunciation: respelling(nok tûrnl)

WordReference Random House Learner's Dictionary of American English © 2020
noc•tur•nal /nɑkˈtɜrnəl/USA pronunciation   adj. 
  1. of or relating to the night.
  2. Animal Behavioractive at night (opposed to diurnal ):nocturnal animals.
noc•tur•nal•ly, adv. See -noct-, -nox-.

WordReference Random House Unabridged Dictionary of American English © 2020
noc•tur•nal  (nok tûrnl),USA pronunciation adj. 
  1. of or pertaining to the night (opposed to diurnal).
  2. done, occurring, or coming at night:nocturnal visit.
  3. Zoology, Animal Behavioractive at night (opposed to diurnal):nocturnal animals.
  4. Botanyopening by night and closing by day, as certain flowers (opposed to diurnal).

  1. [Archaic.]an astrolabe for telling time at night or for determining latitude by the position of certain stars in reference to Polaris.
noc′tur•nali•ty, n. 
noc•turnal•ly, adv. 
  • Late Latin nocturnālis. See nocturn, -al1
  • 1475–85
    • 2.See corresponding entry in Unabridged nighttime.

Collins Concise English Dictionary © HarperCollins Publishers::
nocturnal /nɒkˈtɜːnəl/ adj
  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
Etymology: 15th Century: from Late Latin nocturnālis, from Latin nox night

ˌnocturˈnality n nocˈturnally adv
'nocturnal' also found in these entries:

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