noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A member of a secretive subgroup of the U.S.-based Irish republican organization Clan na Gael, known for making bombing runs into England. historical

Etymology

triangle + -er, since the group ("the Triangle") was established by three men.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.