• WordNet 3.6
    • adj unfaithful not trustworthy "an unfaithful reproduction"
    • adj unfaithful not true to duty or obligation or promises "an unfaithful lover"
    • adj unfaithful having sexual relations with someone other than your husband or wife, or your boyfriend or girlfriend "her husband was unfaithful"
    • adj unfaithful having the character of, or characteristic of, a traitor "the faithless Benedict Arnold","a lying traitorous insurrectionist"
    • ***
Webster's Revised Unabridged Dictionary
    • Unfaithful Not faithful; not observant of promises, vows, allegiance, or duty; violating trust or confidence; treacherous; perfidious; as, an unfaithful subject; an unfaithful agent or servant. "My feet, through wine, unfaithful to their weight.""His honor rooted in dishonor stood,
      And faith unfaithful kept him falsely true."
    • Unfaithful Not possessing faith; infidel.
    • ***
Century Dictionary and Cyclopedia
    • unfaithful Not faithful; not observant of promises, vows, allegiance, or duty.
    • unfaithful Not performing the proper duty or function.
    • unfaithful Not possessing faith; unbelieving; impious; infidel. Not trustworthy; inexact; not conforming to the letter and spirit: as, an unfaithful account; an unfaithful translation.
    • unfaithful Synonyms Faithless, etc. (see perfidious); derelict.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Unfaithful not faithful: violating trust: not having faith, infidel: not trustworthy
    • ***


  • Charlotte Bunch
    Charlotte Bunch
    “America is like an unfaithful love who promises us more than we got.”
  • Brigitte Bardot
    Brigitte Bardot
    “It is better to be unfaithful than faithful without wanting to be.”
  • Marquis De Sade
    “No lover, if he be of good faith, and sincere, will deny he would prefer to see his mistress dead than unfaithful.”
  • Jorge Luis Borges
    “The original is unfaithful to the translation.”
  • Nathaniel Emmons
    Nathaniel Emmons
    “I could never think well of a man's intellectual or moral character, if he was habitually unfaithful to his appointments.”
  • Horace Mann
    “Unfaithfulness in the keeping of an appointment is an act of clear dishonesty. You may as well borrow a person's money as his time.”


In literature:

I never believe in your unfaith.
"Lazarre" by Mary Hartwell Catherwood
For when the travelling company meets with misadventure, the orchestra are usually the first to prove unfaithful.
"A Book of the Play" by Dutton Cook
I will recount the memoranda that I made, lest memory should be unfaithful.
"Traditions of Lancashire, Volume 1 (of 2)" by John Roby
The patrol should be recorded on a watchman's clock, not merely to show that he was not unfaithful, but also to prove that he was faithful.
"The American Architect and Building News, Vol. 27, No. 733, January 11, 1890" by Various
Therefore it is that I do not violently impeach you for your unfaithfulness in the execution of many of your laws.
"American Eloquence, Volume III. (of 4) Studies In American Political History (1897)" by Various
But this weapon will snap short, unfaithful to the hand that employs it.
"The Works of the Right Honourable Edmund Burke, Vol. III. (of 12)" by Edmund Burke
If he does not, then the citizen must criticise, threaten, and, if necessary, finally dismiss the unfaithful employee.
"Woman in Modern Society" by Earl Barnes
But his Minister is unfaithful!
"Count Hannibal A Romance of the Court of France" by Stanley J. Weyman
We went over to Philly, after having been unfaithful to her for too many months.
"Plum Pudding" by Christopher Morley
Yet he knew there would be no further unfaithfulness.
"The Vehement Flame" by Margaret Wade Campbell Deland

In poetry:

Yet not unfaithful nor unkind,
With work-day virtues surely staid,
Theirs is the sane and humble mind,
And dull affections undismayed.
"In Praise Of Solid People" by C S Lewis
Laden with fruits of age, they show
The Lord is holy, just, and true;
None that attend his gates shall find
A God unfaithful or unkind.
"Psalm 92 part 2" by Isaac Watts
Yet! who sails with face set hard
Westward,—while behind him lies
Unfaith,—where his dreams keep guard
Round it, in the sunset skies,
He may reach it—afterward.
"Voyagers" by Madison Julius Cawein
(O mouth that yet should kiss the mouth of Sin!
Were lies so sweet, now bitter to remember?
Slow sinks the flame unfaithful to an ember;
New beauty fades and passion’s wine is thin.)
"The First Food" by George Sterling
Nay, do not weep; new hopes, new dreams, new faces,
The unspent joy of all the unborn years,
Will prove your heart a traitor to its sorrow,
And make your eyes unfaithful to their tears.
"Transience" by Sarojini Naidu
Bland, unfaithful politicians
Long had said this bridge should be.
Some soared on to high positions,
Some sank to obscurity;
Still the bridge had been denied it by its unrelenting foes -
By the foes of patient Wombat, where the Muddy River flows.
"The Bridge Across the Crick" by C J Dennis

In news:

Matters we think of as contemporary: bloody violence, unfaithful and murderous wives and husbands, and kinky, over-the-top sex.
More than half of Americans — 54% — know someone who has an unfaithful spouse, according to a nationwide USA TODAY/Gallup Poll of 1,025 adults.
David Englin (D-45), who announced his resignation back in June after acknowledging being unfaithful in his marriage.
Why are spouses unfaithful .
Researchers believe that the incidence of unfaithfulness among wives may be approaching that of husbands.
Lately, however, researchers have been raising doubts about this view: They believe that the incidence of unfaithfulness among wives may be approaching that of husbands.
Depths of passion / ' Unfaithful ' delivers marital melodrama with strong acting, unexpected truths.
The make-up showing of Unfaithfully Yours (originally cancelled due to snow) is screening Tuesday, Feb 1.
He's heard the rumors about his parents' divorce -- that his father was unfaithful.
In a Twitter rant, Rob claimed the singer was unfaithful with 20 guys.
The annual signing of a fraud policy should be extended to all volunteers, including the board of directors, who aren't immune from committing dishonest or unfaithful acts.
RG3 rewards the unfaithful with Skins' 38-31 win over Dallas.
David Petraeus has received more attention in one week for unfaithfulness to his wife than he did over a long career for faithfulness to his country.
A stressed out unfaithful father and husband, Bernard Pyne.
He admitted to being unfaithful in his marriage.

In science:

For the inconclusive outcome, the teleportation becomes unfaithful.
Optimal conclusive teleportation of a d-dimensional unknown state
Note that when q ≥ 13 is odd, the characters of degree q or (q + ǫ)/2 of SL2 (q) are unfaithful so that these degrees are not the degrees of the proper pro jective irreducible representations of PSL2 (q).
Simple linear groups $PSL_4(q)$ are determined by the set of their character degrees
The proof crucially employs the fact the set of unfaithful linear gaussian and discrete multinomial distributions each have Lebesgue measure zero; the linear gaussian case is discussed in (Spirtes, et. al 2000), and the discrete case in (Meek 1995).
Causal Conclusions that Flip Repeatedly and Their Justification
This starting point will be important to understand how an optimal probabilistic and unfaithful teleportation protocol is connected with a maximum-confidence discrimination strategy, as we shall see in Sec.
Quantum teleportation via maximum-confidence quantum measurements
The final state of system 1 will be either a faithful replica of the unknown state |φ(cid:105) (perfect protocol) or an unfaithful one with the optimal fidelity given by Eq. (25) (imperfect protocol).
Quantum teleportation via maximum-confidence quantum measurements