• WordNet 3.6
    • n preconception an opinion formed beforehand without adequate evidence "he did not even try to confirm his preconceptions"
    • n preconception a partiality that prevents objective consideration of an issue or situation
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Webster's Revised Unabridged Dictionary
    • n Preconception The act of preconceiving; conception or opinion previously formed.
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Century Dictionary and Cyclopedia
    • n preconception A conception or opinion formed in advance of experience or actual knowledge; also, the influence of previous belief or states of mind in modifying the conceptions formed under the partial influence of experience.
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Chambers's Twentieth Century Dictionary
    • Preconception act of preconceiving: previous opinion formed without actual knowledge
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In literature:

But against her knowledge of me and her quick wit no preconception could hold out long.
"The King's Mirror" by Anthony Hope
Now, in that preconception lies the capital blunder incident to the question.
"The Posthumous Works of Thomas De Quincey, Vol. II (2 vols)" by Thomas De Quincey
What lies behind and probably near at hand may not merely revolutionise material agencies but human preconceptions as well.
"James Watt" by Andrew Carnegie
Already some notion of preconception has possessed the observer.
"The Book of the National Parks" by Robert Sterling Yard
Hence, if we consider experience impartially and without preconception, we find that it tells us something which is not given by the senses.
"The English Utilitarians, Volume I." by Leslie Stephen
But he says enough to show that he was misled chiefly by his own preconceptions.
"The War in the Air; Vol. 1" by Walter Raleigh
All this fitted perfectly the captain's preconceptions of Cassylia.
"Deathworld" by Harry Harrison
He works in a noble freedom from prejudice and preconception, uncorrupted by custom as he is untrammelled by tradition.
"Audrey Craven" by May Sinclair
They gave heed to what we term metaphysical preconceptions as to laws governing natural phenomena.
"A History of Science, Volume 5(of 5)" by Henry Smith Williams
Now, please, Mrs. Hawthorne, drop all preconception, and use your eyes.
"Aurora the Magnificent" by Gertrude Hall

In poetry:

—Say it, no ideas but in things—
nothing but the blank faces of the houses
and cylindrical trees
bent, forked by preconception and accident—
split, furrowed, creased, mottled, stained—
secret—into the body of the light!
"from Book I, Paterson" by William Carlos Williams

In news:

In gardening, as in other food matters, there is something to be said for the lackadaisical, unresearched, no-preconceptions approach.
That climatologists are now the target of ideologically driven abuse from climate denialists whose carefully packaged preconceptions are endangered by inconvenient facts is hardly surprising.
Nol Simonse has no preconceptions about what he wants in a boyfriend, except one.
Saatchi exhibition suggests pandering to international preconceptions, clichés all too common.
Historical fiction should also challenge our preconceptions and reveal facets of history we never thought about before — what was it like to be a Bengali opium merchant in 19th century Canton, or a female physician in Renaissance Venice.
If you judge your replacement pickups by the specs, throw any preconceptions out the window where Lindy Fralin's Hum -Cancelling P-90s ($130 each) are concerned.
When it comes to exercise and preconceptions, it's great -- even inspiring -- to be wrong.
The Civic Academy's production of Happy Days features an authentic cast of high-schoolers without TV preconceptions.
If you judge your replacement pickups by the specs, throw any preconceptions out the window where Lindy Fralin's Hum-Cancelling P-90s ($130 each) are concerned.
That preconception has prevented horse tracks from expanding their clientele base to women, who are especially dissuaded from visiting the tracks.
Often, the perceived solution is based on preconceptions and misconceptions we acquired before having children.

In science:

Wigner function, for example, with classical preconceptions.
Embedding quantum and random optics in a larger field theory
Our analysis suggested that our classical preconceptions about the world could indeed possibly have been elaborated throughout a slow evolutionary process, according to a principle of maximization of the relevant information.
Experimental proposal for testing the Emergence of Environment Induced (EIN) Classical Selection rules with Biological Systems
In 1974, Jo¨el Scherk and I decided to take string theory seriously as it stood, rather than forcing it to conform to our preconceptions.
The Early History of String Theory and Supersymmetry
A final theory is free of any philosophical preconception.
On the Nature of Reality
There is no room for philosophical preconceptions.
On the Nature of Reality