the heavy, unrelieved weight of anything inert:
The dead weight of the bear's body was over 300 pounds.
a heavy or oppressive burden or responsibility.
the weight of a railroad car, truck, etc., as distinct from its load or contents.
a heavy weight or load
an oppressive burden; encumbrance
the difference between the loaded and the unloaded weights of a ship
another name for
(in shipping) freight chargeable by weight rather than by bulk
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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The deadweight cost is dependent on the elasticity of supply and demand for a good.