say it: pur-myoo-TAY-shuhn
permutation is a noun meaning "an event in which one thing is substituted for another". It carries 4 recorded senses.
an event in which one thing is substituted for another
“the replacement of lost blood by a transfusion of donor blood”
the act of changing the arrangement of a given number of elements
complete change in character or condition
“the permutations...taking place in the physical world”
act of changing the lineal order of objects in a group
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for permutation come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.