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

  • adverb Certainly.
  • adverb Presumably; probably.
  • adjective Certain; assured.

from The Century Dictionary.

  • Free from doubt; indubitable.
  • Having no fear; free from fear of danger; secure.
  • Without doubt; without objection or uncertainty; unquestionably; often, with weakened sense, presumably, probably.

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

  • adverb Undoubtedly; without doubt.
  • adjective obsolete Free from fear or suspicion.

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

  • adjective Characterized by or experiencing no doubt at all, certain; undoubted; undoubting.
  • adverb Without doubt; very probably, in all likelihood; doubtlessly.

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

  • adverb without doubt; certainly


from Wiktionary, Creative Commons Attribution/Share-Alike License

From doubt +‎ -less.



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