+A **solid** is a fundamental [state of matter](/wiki/state_of_matter), defined by its fixed shape and volume. Unlike a [liquid](/wiki/liquid), its constituent particles are tightly bound and ordered, oscillating around stable positions. This gives solids their characteristic rigidity and strength.
+## See also
+- [Matter](/wiki/matter)
+- [Physics](/wiki/physics)
+- [Phase Transition](/wiki/phase_transition)
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