D defs.my
Entry 1 sense Webster, 1913

Prolegomenon

· Prol·e·gom·e·non · IPA /ˌpɹoʊlɪˈɡɑmənɑn/
01 n. A preliminary remark or observation; an introductory discourse prefixed to a book or treatise.
pl. Prolegomena ((#))
  1. 1.
    A preliminary remark or observation; an introductory discourse prefixed to a book or treatise.