1. The entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet
   - basin, watershed, drainage basin, catchment area, catchment basin, drainage area

Derived forms: river basins

Type of: geographic area, geographic region, geographical area, geographical region

Encyclopedia: River basin

• inscriber
• inscription
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• inscrutability
• inscrutable
• inscrutableness
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• inseam
• insect
• insect bite
• insect powder
• insect repellant
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• Insecta
• insectan
• insecticidal
• insecticidally
• insecticide
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• Insectivora
• insectivore
• insectivorous
• insecure