lunatic fringe

WordReference Random House Learner's Dictionary of American English © 2025

ˈlu•na•tic ˈfringe, n. [countable]

1. members on the outer edges of any group, as in politics or religion, who hold extreme or fanatical views.

WordReference Random House Unabridged Dictionary of American English © 2025

lu′natic fringe′, 

1. members on the periphery of any group, esp. political, social, or religious, who hold extreme or fanatical views.

• 1910–15, American.

Collins Concise English Dictionary © HarperCollins Publishers::

lunatic fringe noun

1. the members of a society or group who adopt or support views regarded as extreme or fanatical