Dictionary
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.