Solids having constituent particles with irregular shapes and short range order are called amorphous solids. Amorphous solids are isotropic in nature and melt over a range of temperature. Thus, amorphous solids are also referred as pseudo solids or super cooled liquids.
Amorphous solids do not have definite heat of fusion.
Amorphous solids give irregular surfaces, when cut with sharp tool.
Glass, rubber, plastic, etc. are some examples of amorphous solid.