AskDefine | Define doubtless

Dictionary Definition

doubtless adv : with certainty; "it's undoubtedly very beautiful" [syn: undoubtedly, beyond question, without doubt, beyond any doubt]

User Contributed Dictionary





  1. Characterized by or experiencing no doubt at all, certain; undoubted; undoubting.
    • 1880: B. Stewart and P. G. Tait, The Unseen Universe, Macmillan (London), p. xiii,
      There are those who have doubtless faith in revelation.
    • 1927: Edgar Rice Burroughs, The Outlaw of Torn, ch. 7,
      It is doubtless that the old reprobate who sued for his daughter's hand heard some unsavory truths from the man.

Derived terms


  1. Without doubt; very probably, in all likelihood; doubtlessly.
    • 1893: Ambrose Bierce, "The Realm Of The Unreal",
      I cannot remember that I spoke a word, though doubtless I did.

Derived terms


  • Webster 1828}}

Synonyms, Antonyms and Related Words

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