/ 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 Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language