Definitions

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

  • adj. Based on sound judgment, reasoning, or evidence; adequately substantiated: well-founded suspicions.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. based on reasoning, evidence and good judgement
  • adj. properly substantiated

from The Century Dictionary and Cyclopedia

  • Founded on good reasons; having strong probability; not baseless: as, well-founded suspicions.

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

  • adj. based on sound reasoning or evidence

Etymologies

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