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Definition of Detention basin
1. Noun. A storage site (such as a small reservoir) that delays the flow of water downstream.
Generic synonyms: Basin, Catchment Area, Catchment Basin, Drainage Area, Drainage Basin, River Basin, Watershed
Definition of Detention basin
1. Noun. A depression in the ground designed to fill with rainwater that would otherwise cause flooding ¹
¹ Source: wiktionary.com