solid

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solid

 [sol´id]
1. not fluid or gaseous; not hollow.
2. a substance or tissue not fluid or gaseous.

sol·id

(sol'id),
1. Firm; compact; not fluid; without interstices or cavities; not cancellous.
2. A body that retains its form when not confined; one that is not fluid, neither liquid nor gaseous.
[L. solidus]

solid

Physics
adjective Referring to a substance that is not liquid or gas.
 
noun A substance, material or object that is not a liquid or gas.

sol·id

(sol'id)
1. Firm; compact; not fluid; without interstices or cavities; not cancellous.
2. A body that retains its form when not confined; one that is not fluid, neither liquid nor gaseous.
[L. solidus]