1. the upper layer of soil that is rich in nutrients and organic matter, where most plant roots grow

1. to remove the topsoil from an area of land
2. to cover an area with topsoil

Examples

• The farmer tested the topsoil to check its nutrient levels.
• Heavy rains washed away much of the topsoil from the hillside.
• We need to add more topsoil to the garden before planting.
• The construction crew will topsoil the area after removing the rocks.
• Rich topsoil is essential for growing healthy vegetables.
• They topsoiled the lawn area with fresh soil from the nursery.
• Erosion can strip away valuable topsoil over time.