Definify.com
Webster 1913 Edition
Jonah
Jo′nah
,Noun.
The Hebrew prophet, who was cast overboard as one who endangered the ship; hence, any person whose presence is unpropitious.
Jonah crab
(Zool.)
, a large crab (
Cancer borealis
) of the eastern coast of the United States, sometimes found between tides, but usually in deep water.