Definitions

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

  • adj. Lacking principles or moral scruples; unscrupulous: unprincipled behavior.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. lacking moral values

from the GNU version of the Collaborative International Dictionary of English

  • adj. Being without principles; especially, being without right moral principles; also, characterized by absence of principle.

from The Century Dictionary and Cyclopedia

  • Not having settled principles; not grounded in principle.
  • Having no sound moral principles; destitute of virtue; not restrained by conscience; profligate; immoral.
  • Not resulting from good principles; iniquitous; wicked.

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

  • adj. having little or no integrity
  • adj. lacking principles or moral scruples

Etymologies

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