Definition of yellow jack. 1 : yellow fever. 2 : a yellowish carangid marine food fish (Caranx bartholomaei) found from Massachusetts to Brazil.
The yellow jack is a species of offshore marine fish in the jack family. Yellow Jack or Yellow Jack fever may also refer to: yellow fever, an acute viral disease.. A yellow or yellow and black flag, or "jack", used to identify ships quarantined due to the presence of a disease.
Yellowjacket or Yellow jacket is the common name in North America for predatory social wasps of the genera Vespula and Dolichovespula. Members of these .
noun, plural (especially collectively) yelÂ·low jack, (especially referring to two or more kinds or species) yelÂ·low jacks for 3. Informal . quarantine flag. Pathology .
Yellow jack: 1) The flag displayed from lazarettos, naval hospitals, and vessels in quarantine. 2) Synonym for yellow fever as, for example, in ".Fernando .
Define yellow jack. yellow jack synonyms, yellow jack pronunciation, yellow jack translation, English dictionary definition of yellow jack. n. 1. A yellowish-silver .