In software programming, SOLID is a mnemonic acronym for five design principles intended to make object-oriented designs more understandable, flexible, and maintainable.

: a geometric figure or element (as a cube or a sphere) having three dimensions. : a solid substance : a substance that keeps its size and shape. : possessing or characterized by the properties of a solid : neither gaseous nor liquid. of immunity …

SOLID definition: 1. hard or firm, keeping a clear shape: 2. completely hard or firm all through an object, or…. Learn more.

Oct 19, 2020 · A solid is defined as a state of matter with a definite shape and volume. In contrast, liquids can change shapes, while gases can change both shape and volume. The particles in a solid (atoms, molecules, ions) are tightly-packed compared to liquids and gases.

Mar 12, 2025 · Solid, one of the three basic states of matter, the others being liquid and gas. A solid forms from liquid or gas because the energy of atoms decreases when the atoms take up a relatively ordered, three-dimensional structure.

SOLID meaning: 1. hard and firm without holes or spaces, and not liquid or gas: 2. strong and not easily broken…. Learn more.

A solid, as opposed to a liquid or gas, has a size and shape to it. It doesn't flow like water or disappear into the air. At first glance, solid appears to be a simple word, but it really offers …

SOLID meaning: 1 : firm or hard not having the form of a gas or liquid; 2 : having no space inside not hollow

A solid is a substance that stays the same shape whether it is in a container or not.

solid - the state in which a substance has no tendency to flow under moderate stress; resists forces (such as compression) that tend to deform it; and retains a definite size and shape