| Noun | 1. | permutation - an event in which one thing is substituted for another; "the replacement of lost blood by a transfusion of donor blood" | |
| 2. | permutation - the act of changing the arrangement of a given number of elementsmathematical operation, mathematical process, operation - (mathematics) calculation by mathematical methods; "the problems at the end of the chapter demonstrated the mathematical processes involved in the derivation"; "they were learning the basic operations of arithmetic" | |
| 3. | permutation - complete change in character or condition; "the permutations...taking place in the physical world"- Henry Millertranslation, transformation - the act of changing in form or shape or appearance; "a photograph is a translation of a scene onto a two-dimensional surface" | |
| 4. | permutation - act of changing the lineal order of objects in a group | |