Breadcrumb Home > Dictionary > Index C cypher: Meaning and Definition of Find definitions for: cy•pher Pronunciation: (sī'fur), [key] — n., v.i., v.t. Chiefly Brit. cipher. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cypher (Thesaurus) cyperaceous cy pres TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: oungurk Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language