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Meaning of stylebook

style•book

Pronunciation: (stīl'book"), [key]
— n.
  1. a book containing rules of usage in typography, punctuation, etc., employed by printers, editors, and writers.
  2. a book featuring styles, fashions, or the rules of style.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.