or totally uninformed person; ignoramus.
3. (initial capital letters) U.S. History.
a member of a political party (American party or Know-Nothing party)
prominent from 1853 to 1856, whose aim was to keep control
of the government in the hands of native-born citizens: so called because members originally professed ignorance of the party's activities.
a person whose anti-intellectualism, xenophobia, and other political attitudes recall the Know-Nothings.
grossly ignorant; totally uninformed.
(initial capital letters) of or pertaining to the Know-Nothings.
of or pertaining to a political know-nothing.
Origin: Related forms