Definition of deringer:
(n) :
A surname from German.
(n) :
(dated, 1800s) Alternative form of derringer. [A type of very small, concealable pistol with one or two barrels, but without any loading system or magazine.]
(n) :
(dated, late 1800s) Alternative spelling of derringer. [A type of very small, concealable pistol with one or two barrels, but without any loading system or magazine.]