WordReference Random House Learner's Dictionary of American English © 2026
ˈyel•low ˌjack•et, n. [countable]
  1. Insectsa wasp having black and bright yellow bands on the body.

WordReference Random House Unabridged Dictionary of American English © 2026
yel′low jack′et, 
    1. Insectsany of several paper wasps of the family Vespidae, having black and bright yellow bands.
    2. Drugs, Slang Terms[Slang.]a yellow capsule of phenobarbital.
    • 1790–1800, American.

Collins Concise English Dictionary © HarperCollins Publishers::
yellow jacket n
  1. US Canadian any of several social wasps of the genus Vespa, having yellow markings on the body
'yellow jacket' also found in these entries (note: many are not synonyms or translations):
paper wasp - yellow

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