Doubtless

//ˈdaʊ̯tləs// adj, adv

adj, adv ·Moderate ·College level

Definitions

Adjective
  1. 1
    Characterized by or experiencing no doubt at all, certain; undoubted; undoubting. not-comparable

    "There are those who have doubtless faith in revelation."

  2. 2
    Free from fear or suspicion. not-comparable, obsolete

    "And, pretty childe, ſleepe doubtleſſe, and ſecure, / That Hubert for the wealth of all the world, / Will not offend thee."

Adverb
  1. 1
    Without doubt; certainly; definitely; very probably, in all likelihood; doubtlessly. not-comparable

    "[…] And, doubtless, unto thee is given ⁠A life that bears immortal fruit ⁠In such great offices as suit The full-grown energies of heaven."

Adverb
  1. 1
    without doubt; certainly wordnet

Synonyms

All synonyms
doubtlesslyindubitablyabsolutelyadmittedlyassumablyassured

Example

More examples

"Doubtless you have heard the news."

Etymology

From Middle English douteles, dowteles, equivalent to doubt + -less.

Related phrases

in all likelihood

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.