Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Lacking substance or reality. See Synonyms at immaterial.
  • adj. Not firm or solid; flimsy.
  • adj. Delicate; fine.
  • adj. Negligible in size or amount.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Lacking substance; not real or strong.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Unsubstantial; not real or strong.

from The Century Dictionary and Cyclopedia

  • Unsubstantial.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. lacking material form or substance; unreal
  • adj. lacking in nutritive value

Etymologies

in- +‎ substantial (Wiktionary)

Examples

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