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Definition of Wingnut
1. Noun. A nut having wing-like projections so that it can be turned easily by hand ¹
2. Noun. A deciduous tree of the genus ''Pterocarya'' native to Asia ¹
3. Noun. (slang) a derogatory term for anyone perceived as odd, eccentric, and/or extreme ¹
4. Noun. (slang rural US) Air Force personnel in towns that host a USAF installation ¹
¹ Source: wiktionary.com