'night owl' definitions:

Definition of 'night owl'

From: WordNet
noun
A person who likes to be active late at night [syn: night owl, nighthawk, nightbird]

Definition of 'night owl'

From: GCIDE
  • nightbird \nightbird\ n. A person who likes to be active late at night; a night owl.
  • Syn: night owl, nighthawk. [WordNet 1.5]

Definition of 'night owl'

From: GCIDE
  • nighthawk \nighthawk\ n.
  • 1. A person who likes to be active late at night; a {night owl}.
  • Syn: night owl, nightbird. [WordNet 1.5]
  • 2. (Zool.) Any of several mainly nocturnal North American goatsuckers, especially Chordeiles minor, or the related European goatsucker Caprimulgus europaeus, also called the nightjar.
  • Syn: bullbat, mosquito hawk. [WordNet 1.5]

Definition of 'night owl'

From: GCIDE
  • night owl \night" owl`\ n. A person who likes to be active late at night.
  • Syn: nighthawk, nightbird. [WordNet 1.5]