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Definition of Topsoil
1. Noun. The layer of soil on the surface.
Definition of Topsoil
1. n. The upper layer of soil; surface soil.
Definition of Topsoil
1. Noun. The most fertile soil, easiest to start new plants in. ¹
¹ Source: wiktionary.com
Definition of Topsoil
1. to remove the surface layer of soil from [v -ED, -ING, -S]
Medical Definition of Topsoil
1. The upper part of the soil profile that is relatively rich in humus, which is technically known as the A-horizon of the soil profile. (09 Oct 1997)