[f. ABSTRACT a. + -NESS.] The quality of being abstract, or of being withdrawn and separate from the actual, the concrete, or the common; subtilty.

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1690.  Locke, Hum. Underst., To Rdr. Truths, which established Prejudice, or the Abstractness of the Ideas themselves, might render difficult.

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1862.  H. Spencer, First Princ. (1875), I. ii. § 14. 44. The truth we have arrived at is one exceeding in abstractness the most abstract religious doctrines.

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