1. plural of excluder; things or people that exclude or keep out
Usage: commonly used in beekeeping to refer to a device that prevents larger bees from passing through
2. people or entities that practice exclusion or discrimination

Examples

• The beekeeper installed queen excluders to keep the larger drones away from the honey storage area.
• Social excluders often create barriers that prevent marginalized groups from participating fully.
• These excluders are designed to filter out particles larger than one micron.
• The excluders in the hive allow worker bees to pass while blocking the queen.
• Institutional excluders can take many forms, from explicit rules to subtle biases.