1. (n.) Transposition, as of the letters or syllables of a word; as, pistris for pristis; meagre for meager.

2. (n.) A mere change in place of a morbid substance, without removal from the body.

3. (n.) The act, process, or result of exchange, substitution, or replacement of atoms and radicals; thus, by metathesis an acid gives up all or part of its hydrogen, takes on an equivalent amount of a metal or base, and forms a salt.

assimilation avatar basal metabolism catabolism catalysis consubstantiation displacement heterotopia metabolism metagenesis metamorphism metamorphosis metastasis metathesis metempsychosis mutant mutated form mutation permutation reincarnation sport transanimation transfiguration transfigurement transformation transformism translation translocation transmigration transmogrification transmutation transposition transubstantiation