Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Lacking understanding or knowledge.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective not providing any clue.
  • adjective completely uninformed or unaware; hopelessly ignorant; utterly bewildered.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Lacking knowledge or understanding; uninformed.

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

  • adjective totally uninformed about what is going on; not having even a clue from which to infer what is occurring

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

clue +‎ -less

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