noun a substance or object that is firm and stable in shape; not liquid or fluid
adjective firm and stable in shape; not liquid or fluid
adverb in a firm and stable manner; not loosely or weakly
In mathematics, 'solid' can refer to a three-dimensional geometric shape, such as a solid cube or sphere.
In geology, 'solid' can refer to rock formations or mineral deposits that are hard and compact.
In engineering, 'solid' is used to describe materials that have high strength and durability, such as solid metals or concrete.
In chemistry, 'solid' can refer to a substance that is not a liquid or gas, or to a chemical compound that is stable and not easily broken down.
In physics, 'solid' refers to a state of matter characterized by particles that are closely packed together and have a definite shape and volume.
In the context of a writer, 'solid' may be used to describe a well-developed plot or well-rounded characters in a story.
A psychologist may use 'solid' to refer to a client's mental state or emotional foundation being stable and secure.