English

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Etymology

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  • jack +‎ light. Probably from jack (a male servant of any rank), later associated with a boy servant or any boy, and later still with a knave: a rogue, thief, or deceitful man.
  • Possibly also related to Spanish jaque (a bully).

Pronunciation

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Noun

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jacklight (plural jacklights)

  1. (Canada, US) A spotlight or lamp mounted on a car, boat or pole, etc. to aid in hunting.
    • 1931, William Faulkner, Sanctuary, Library of America, published 1985, page 19:
      It was a long, low roadster, with a jacklight.

Verb

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jacklight (third-person singular simple present jacklights, present participle jacklighting, simple past and past participle jacklighted or jacklit)

  1. (hunting, US, Canada) To shine a jacklight or spotlight on an animal, usually a deer, to aid in hunting at night.
    Synonyms: (Britain, Ireland) lamp, spotlight
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