Of the various definitions given, you disregard all save the one which enables the word to make sense in its present context, or which fits your preconception of what the word should stand for.

Wherefore we all use these names, and we endeavor to fit the preconceptions to the several cases (things) thus: he has done well; he has not done well; he has done as he ought, not as he ought; he has been unfortunate, he has been fortunate; he is unjust, he is just; who does not use these names?

Can you then show us anything better towards adapting the preconceptions beyond your thinking that you do?

And she shattered all my preconceptions about her.

Anyone who should take up the writings themselves with no other preconception than that which we have attempted to give him, would doubtless be startled at the strangeness of the style which prevails more or less throughout them.

His Childe Harold contains a lofty and impassioned review of the great events of history, of the mighty objects left as wrecks of time, but he dwells chiefly on what is familiar to the mind of every school-boy; has brought out few new traits of feeling or thought; and has done no more than justice to the reader's preconceptions by the sustained force and brilliancy of his style and imagery.

He starts with no preconceptions as to what truth must mean, whether it exists or not; he is content to watch how de facto claims to truth get themselves validated in experience.