Sthula may be commonly used in yoga and Hinduism to describe things which are big or heavy. For instance, sthula kaya means “fat body.” It can also suggest the terms “vaguely” or “broadly.”
Sthula is sometimes defined in terms of its opposite and complementary quality, sukshma. Sukshma is an adjective to describe the intangible, subtle and ethereal aspects of something. It is said that all objects that have sthula also have a subtle, underlying sukshma aspect underlying. They also exist on a subtle or astral level. It is this aspect that provides the feeling or connection between the physical world and the subtle.
Sthula and sukshma, as qualities, are interdependent and the relationship between them is changing and fluctuating, even through sthula appears fixed and permanent. In metaphysical terms, sthula and sukshma are two of the three levels of existence, the other being the causal level, or karana.