WordReference Random House Unabridged Dictionary of American English © 2020
hot-press  (hotpres′),USA pronunciation n. 
  1. a machine applying heat in conjunction with mechanical pressure, as for producing a smooth surface on paper or for expressing oil.

  1. to subject to treatment in a hot-press.
hot-press′er, n. 
  • 1625–35

Collins Concise English Dictionary © HarperCollins Publishers::
hot-press n
  1. a machine for applying a combination of heat and pressure to give a smooth surface to paper, to express oil from it, etc
  1. (transitive) to subject (paper, cloth, etc) to heat and pressure to give it a smooth surface or extract oil
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