Definition of metathesis noun from the Oxford Advanced Learner's Dictionary

 

metathesis

 noun
noun
BrE BrE//məˈtæθəsɪs//
 
; NAmE NAmE//məˈtæθəsɪs//
 
(pl. metatheses
BrE BrE//məˈtæθəsiːz//
 
; NAmE NAmE//məˈtæθəsiːz//
 
)
[uncountable](linguistics)
 
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a change in the order of sounds or letters in a word Word Origin late 16th cent.: from Greek, from metatithenai ‘transpose, change the position of’.
See the Oxford Advanced American Dictionary entry: metathesis