Pronunciation: (nō'nuth"ing),[key] —n. 1. an ignorant or totally uninformed person; ignoramus.
2. an agnostic.
3. (caps.) U.S. Hist.a member of a political party (American party or Know'-Noth"ing par"ty) 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.
4. a person whose anti-intellectualism, xenophobia, and other political attitudes recall the Know-Nothings.
—adj. 1. grossly ignorant; totally uninformed.
3. (caps.) of or pertaining to the Know-Nothings.
4. of or pertaining to a political know-nothing.