substitution
noun(sub-sti-tu-tion)
the act, process, or result of substituting one thing for another
substitution
noun(sub-sti-tu-tion)
replacement of one mathematical entity by another of equal value
substitution
noun(sub-sti-tu-tion)
one that is substituted for another
substitution
noun(sub-sti-tu-tion)
a cipher in which the letters of the plaintext are systematically replaced by substitute letters