• WordNet 3.6
    • adj unbelievable beyond belief or understanding "at incredible speed","the book's plot is simply incredible"
    • adj unbelievable having a probability too low to inspire belief
    • ***
Century Dictionary and Cyclopedia
    • unbelievable Not to be believed; incredible.
    • ***


  • Leo Rosten
    “I never cease being dumbfounded by the unbelievable things people believe.”
  • Desiderius Erasmus
    “They take unbelievable pleasure in the hideous blast of the hunting horn and baying of the hounds. Dogs dung smells sweet as cinnamon to them.”
  • John Ruskin
    “People are eternally divided into two classes, the believer, builder, and praiser, and the unbeliever, destroyer and critic.”
  • Marcus T. Cicero
    “Nothing is so unbelievable that oratory cannot make it acceptable.”
  • Rene Descartes
    Rene Descartes
    “There is nothing so strange and so unbelievable that it has not been said by one philosopher or another.”


In literature:

The question rose suddenly in the mind of the unbeliever, and seemed to demand an answer.
"Marzio's Crucifix and Zoroaster" by F. Marion Crawford
The apologists of religion repeat to us every day that the passions alone create unbelievers.
"Superstition In All Ages (1732)" by Jean Meslier
It was unbelievably low-pitched.
"Operation Terror" by William Fitzgerald Jenkins
The whole weird and unbelievable experience was making her distrust herself, and the storm was more and more unnerving her.
"The Shield of Silence" by Harriet T. Comstock
Each wants to be believed on its own authority, and threatens unbelievers.
"Pascal's Pensées" by Blaise Pascal
They watched as the Confederation report came clacking off the teletype, and they stared at it unbelieving.
"Star Surgeon" by Alan Nourse
Recovering from the dizziness, with eyes large and black and her face very pale, Suzanna gazed unbelievingly at her mother.
"Suzanna Stirs the Fire" by Emily Calvin Blake
But it is no use trying to cheat unbelievers.
"Modern Skepticism: A Journey Through the Land of Doubt and Back Again" by Joseph Barker
In the air they were unbelievably clumsy.
"Space Tug" by Murray Leinster
Even if he joined the church he would be an unbeliever.
"Green Valley" by Katharine Reynolds
They commit unbelievable horrors, because the thing that moves them is raw force, untouched by fine purpose and the elements of mercy.
"Golden Lads" by Arthur Gleason and Helen Hayes Gleason
We moved steadily forward to the attack, steadily but unbelievingly.
"The Leicestershires beyond Baghdad" by Edward John Thompson
The latter would not baptize the children of unbelievers nor hold any communion with them.
"History of Rationalism Embracing a Survey of the Present State of Protestant Theology" by John F. Hurst
The Metamorphizer not only worked, but it worked with unbelievable rapidity.
"Greener Than You Think" by Ward Moore
I want revenge on the unbelieving dogs; and will buy them for the purpose of obtaining it.
"The Boy Slaves" by Mayne Reid
Who has not seen the unbelieving husband sanctified, made serious and holy, by the believing wife?
"The Young Maiden" by A. B. (Artemas Bowers) Muzzey
The unbelievable thing must be true, then.
"Treasure Valley" by Marian Keith
We sat hushed and unbelieving in that terrible, deathlike silence.
"The Floating Island of Madness" by Jason Kirby
Then silence again, while the pale-faced Hadley went on with his unbelievable story.
"Lords of the Stratosphere" by Arthur J. Burks
Therefore, we dare hope, if indeed it is a thing to hope, that she is not dead, but carried away captive by the unbelievers.
"God Wills It!" by William Stearns Davis

In poetry:

In faith and kinship with real life
And with the future knit as one,
We're bound to find immortal words
Of unbelievable simplicity.
"Things of great worth shall come to pass..." by Boris Pasternak
But when, how soon the frame's away,
And comfortable feelings fail;
So soon my faith falls in decay,
And unbelieving doubts prevail:
"The Believer's Principles : Chap. IV." by Ralph Erskine
Clamours of unbelieving fears,
So frequently disturb mine ears,
I cannot hear what faith would say,
Till once the noisy clamours stay.
"The Believer's Principles : Chap. IV." by Ralph Erskine
But unbelieving they sailed away,
Afraid of their life more and more.
But it happened just as Paul said it would.
They were saved by wading to shore.
"Paul Is Shipwrecked" by Doris Clore Demaree
Two sorts alone of men, on earth, are known,
The unbelievers, and the faithful train —
The former to perdition, shall be thrown,
The latter shall in endless bliss remain.
"Concerning Purgatory " by Rees Prichard
The saintly hermit, midway through his prayers
stopped suddenly, and raised his eyes to witness
the unbelievable: for there before him stood
the legendary creature, startling white, that
had approached, soundlessly, pleading with his eyes.
"The Unicorn" by Rainer Maria Rilke

In news:

With its jaw-dropping pilot, to its unbelievable finale, audiences could not get enough of the series.
China Nobel winner's wife calls her house arrest 'absurd and unbelievable'.
RI Troopers in New Jersey say devastation is unbelievable.
A flashback to a CNN article from just before the 2004 election era shows just how unbelievable today's new unemployment numbers are.
"We had an unbelievably awesome opening meet," Herd coach Jeff Small said.
This story is almost unbelievable.
For the bare majority to have voted for this administration seems unbelievable to me.
Vampire Hunter unbelievable, yet enjoyable .
One of the things that makes the Olympics so great is that you never know when some athlete is going to explode with an amazing, outstanding, unbelievable and history-making performance.
It now sits at $550 million – a number that's unbelievable, event a local man who's won a $23-million jackpot.
Unbelievably, the year 2013 is nearly upon us.
After the longest game in the history of not only the Big East tourney, but also each teams' storied past, Syracuse stumbled out of the Garden early Friday morning with a 127-117 win over #4 Connecticut after an unbelievable 6 overtimes.
There may be a small cult of unbelievers out there, but their opinions count about as much as those of flat-earthers and moon-landing conspiracy nuts.
American Science & Surplus: 75 years of "incredible stuff, unbelievable prices".
The unbelievable tragedy of the death of Natasha Richardson is certainly most awful for her family.

In science:

However, since the two particles in this experiment are emitted in an unentangled state, the results obtained maybe seem unbelievable.
On the Experimental Incompatibility Between Standard and Bohmian Quantum Mechanics
However, this solution has the fatal flaw that it does not satisfy the equation of continuity: If one were to estimate the mass flux from the irradiated to the shadowed side by this formula, he would come to the unbelievable conclusion of no mass flux across the shadow boundary because the velocity there is zero.
Enhanced mass transfer during dwarf nova outbursts by irradiation of the secondary?
Although there is α . 63o as discussed in section 2, the angle should not be too small, or it would give too wide radio beams (Fig.1), which must be emitted from unbelievably high distances near the light cylinder.
Possible evidence for the pulsed X-ray emission from outer gap in PSR B1937+21?
This results in a severe fine-tuning problem of order 1055 , since the virtual quantum fluctuations giving rise to λvac must cancel λ0 to an unbelievable degree of accuracy.
Satellite E\"otv\"os Test of the Weak Equivalence Principle for Zero-Point Vacuum Energy
Because the Lorentz-Dirac equation has so many unbelievable consequences, many authors have proposed replacements for it. F.
Comment on Phys. Rev. D 60 084017 "Classical self-force" by F. Rohrlich
In this paper we analyze the status of some ‘unbelievable results’ presented in the paper ‘On Some Contradictory Computations in MultiDimensional Mathematics’ published in Nonlinear Analysis, a journal indexed in the Science Citation Index.
A Comment on "On Some Contradictory Computations in Multi-dimensional Mathematics"
Among some of the unbelievable results ‘proved’ in the paper we can find statements like that: (i) a rotation Tθ : R2 → R2 , θ 6= nπ/2, is inconsistent with arithmetic, (ii) complex number theory is inconsistent.
A Comment on "On Some Contradictory Computations in Multi-dimensional Mathematics"
Among such predictions, the existence of a macroscopic ob ject in superposition is especially unbelievable.
Proposal for testing Einstein's moon using three-time correlations
The appearance of d2 = 7 as a special case seems like an almost unbelievable coincidence.
Information-theoretic postulates for quantum theory
Though some models have been proposed to this question, one of the most possible one is considered to be the model of DMS-ferromagnetism. We, at first, experimentally confirm the ferromagnetism and unbelievably high TC value on (Ga,Mn)N in comparing with the possibility of super-paramagnetism.
A possible model to high TC ferromagnetism in Gallium Manganese Nitrides based on resonation properties of impurities in semiconductors
As is easily understood from the data in Fig.1, the value of TC is unbelievably high. The hysteresis curve clearly indicates typical property of ferromagnetism. The remnant moment means spontaneous spin-polarization and existence of domain area.
A possible model to high TC ferromagnetism in Gallium Manganese Nitrides based on resonation properties of impurities in semiconductors
This temperature, however, is at the condensation limit for dust and possibly unbelievable.
New results on planetary nebula shaping and stellar binarity