(programming, object-oriented programming) Acronym of Single responsibility, Open-closed, Liskov substitution, Interface segregation and Dependency inversion. (When followed, the created system will be more likely easy to maintain, and extend over time.)

(of an object or substance) That can be picked up or held, having a texture, and usually firm. Unlike a liquid, gas or plasma. / Large in size, quantity, or value.

Solidly. / (not comparable, typography) Without spaces or hyphens.

(chemistry) A substance in the fundamental state of matter that retains its size and shape without need of a container (as opposed to a liquid or gas).

(medicine, obsolete) The doctrine that the solid parts of the body are the only parts that have vital properties and are susceptible to disease

plural of solid

The state or quality of being solid. / Moral firmness; validity; truth; certainty. / (geometry) The solid contents of a body; volume; amount of enclosed space.

plural of solidity

Misspelling of soldier.

comparative form of solid: more solid