1. Soil with low bearing capacity, easily compressible, and lacking firmness or stability; typically characterized by high water content and low density
The construction site had soft soil that required special foundation reinforcement.
O terreno da obra tinha solo mole que exigia reforço especial de fundação.
2. In geotechnical engineering, soil that deforms easily under load and has poor structural properties
Engineers tested the soft soil before designing the building's foundation.
Os engenheiros testaram o solo mole antes de projetar a fundação do edifício.