A solid has substance and shape. It's particles vibrate around a point, but do not 'flow' over each other like a liquid does. Typical 'hard' solids cannot be compressed.
Has a fixed volume and a fixed shape. Apex
In this case the entropy increase.
A solid person is dependable, reliable, trustworthy, and genuine.
Freezing
This describes a crystalline solid.
its hot but solid rock
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Tephra
The sum of the areas of each face of the solid.
Adjectives that describes a "Diamond" are: Sparkling, shiny, hard, solid, expensive, beautiful, etc.
Volume.
Terrestrial
"freezing"