1. a geographical area defined by natural ecological boundaries rather than political ones, characterized by distinctive plant and animal communities
Usage: ecology; environmental science

Examples

• The Pacific Northwest bioregion extends from Northern California to Southeast Alaska.
• Conservation efforts focus on protecting entire bioregions rather than individual species.
• Each bioregion has its own unique climate patterns and native species.
• The Great Basin bioregion is characterized by desert and semi-arid conditions.
• Scientists study bioregions to understand how ecosystems function as interconnected units.
• Urban planning increasingly considers bioregional boundaries for sustainable development.