/ Dictionary / Index T transposition cipher: Meaning and Definition of Find definitions for: transposi'tion ci"pher Pronunciation: [key] — Cryptography. Cryptography. a cipher that rearranges the letters of the plain text in a different sequence. Cf. substitution cipher. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. transposition transposon Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language