1. a loose, decentralized anti-fascist movement or network of activists who oppose fascism and far-right ideologies, often through direct action and protest
Usage: informal; often used as a collective noun without a formal organizational structure; primarily used in political discourse since the 2010s

Examples

• Antifa protesters gathered to demonstrate against the far-right rally.
• The term antifa refers to a decentralized movement rather than a single organization.
• Some view antifa as a necessary response to rising fascism, while others criticize its tactics.
• News coverage of antifa activities has become increasingly prominent in recent years.
• Antifa is not a membership-based group with leadership or formal structure.