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Webster 1913 Edition

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Noun.

;

pl.

Prolegomena

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[ NL., fr. Gr. [GREEK], properly neut. pass. p. pr. of [GREEK] to say beforehand; [GREEK] before + [GREEK] to say.]

A preliminary remark or observation; an introductory discourse prefixed to a book or treatise.

D. Stokes (1659). Sir W. Scott.

prolegomenon ‎(plural prolegomena)

(usually in the plural) A prefatory discussion; a formal essay or critical discussion serving to introduce and interpret an extended work.