(in the French Revolution) a member of a radical society or club of revolutionaries that promoted the Reign of Terror and other extreme measures, active chiefly from 1789 to 1794

so called from the Dominican convent in Paris, where they originally met.

an extreme radical, esp. in politics.

a Dominican friar.

( lowercase ) one of a fancy breed of domestic pigeons having neck feathers that hang over the head like a hood.