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Meaning of unsubstantial

un•sub•stan•tial

Pronunciation: (un"sub-stan'shul), [key]
— adj.
  1. not substantial; having no foundation in fact; fanciful; insubstantial: an unsubstantial argument; unsubstantial hopes.
  2. without material substance: an unsubstantial ghost.
  3. lacking material substance; materially paltry: an unsubstantial dinner of bread and cheese.
  4. lacking strength or solidity; flimsy: an unsubstantial wall of cardboard.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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