1. a member of a radical political club during the French Revolution, known for extreme democratic and egalitarian views
Usage: historical; often capitalized
2. a person with radical or revolutionary political views
Usage: often lowercase; extended sense
3. a small pigeon with a hood-like crest of feathers on its head
Usage: ornithology

Examples

• The Jacobins dominated French politics during the Reign of Terror.
• He was accused of being a Jacobin for his radical reform proposals.
• The Jacobin club met regularly to discuss revolutionary ideals.
• Modern Jacobins advocate for sweeping social change.
• The jacobin pigeon is prized by breeders for its distinctive appearance.
• Jacobin doves are known for their elegant, feathered hoods.