solid

n. figure or object having three dimensions; substance that is not a liquid or a gas, substance exhibiting rigidity

adj. three-dimensional; not liquid or gas, hard; having not interior cavities, not hollow; pure, unmixed; continuous; strong, stable; sound, reliable; united; unanimous; serious, substantial; thorough

A solid object is in the states of matter characterized by resistance to deformation and changes of volume. At the microscopic scale, a solid has these properties :The atoms or molecules that comprise the solid are packed closely together.These constituent elements have fixed positions in space relative to each other. This accounts for the solid's rigidity. In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. A crystal structure is composed of a unit cell, a set of atoms arranged in a particular way; which is periodically repeated in three dimensions on a lattice. The spacing between unit cells in various directions is called its lattice parameters. The symmetry properties of the crystal are embodied in its space group. A crystal's structure and symmetry play a role in determining many of its properties, such as cleavage, electronic band structure, and optical properties.If sufficient force is applied, either of these properties can be violated, causing permanent deformation.Because any solid has some thermal energy, its atoms vibrate. However, this movement is very small, and cannot be observed or felt under ordinary conditions.
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adj. solid, strong; stable; secure

(n.)
A substance that is held in a fixed form by cohesion among its particles; a substance not fluid.
  

(n.)
A magnitude which has length, breadth, and thickness; a part of space bounded on all sides.
  

(a.)
United; without division; unanimous; as, the delegation is solid for a candidate.
  

(a.)
Sound; not weakly; as, a solid constitution of body.
  

(a.)
Of a fleshy, uniform, undivided substance, as a bulb or root; not spongy or hollow within, as a stem.
  

(a.)
Not hollow; full of matter; as, a solid globe or cone, as distinguished from a hollow one; not spongy; dense; hence, sometimes, heavy.
  

(a.)
Not having the lines separated by leads; not open.
  

(a.)
Impenetrable; resisting or excluding any other material particle or atom from any given portion of space; -- applied to the supposed ultimate particles of matter.
  

(a.)
Having the constituent parts so compact, or so firmly adhering, as to resist the impression or penetration of other bodies; having a fixed form; hard; firm; compact; -- opposed to fluid and liquid or to plastic, like clay, or to incompact, like sand.
  

(a.)
Having all the geometrical dimensions; cubic; as, a solid foot contains 1,728 solid inches.
  

(a.)
Firm; compact; strong; stable; unyielding; as, a solid pier; a solid pile; a solid wall.
  

(a.)
Fig.: Worthy of credit, trust, or esteem; substantial, as opposed to frivolous or fallacious; weighty; firm; strong; valid; just; genuine.
  

(a.)
Applied to a compound word whose parts are closely united and form an unbroken word; -- opposed to hyphened.
  

A material which has a vertical flow of two inches (50 mm) or less within a three-minute period, or a separation of less than one gram (18) of liquid when determined in accordance with the procedures specified in American Society for Testing and Materials (ASTM) D 4359, "Standard Test Method for Determining Whether a Material is a Liquid or Solid." (49CFR171)