'''Solid''' is the [[state of matter]], followed by [[gas]] and [[liquid]] in order of increasing [[elasticity]], in which the overall [[kinetic energy]] of the consituent [[atom|atoms]] is such that a certain degree of elasticity is present.
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'''Solid''' is the state of [[matter]] in which the constituent [[molecule]]s are constrained in their relative location to each other, and take up a fixed [[volume]].