af·​ter·​treat·​ment | \ ˈaf-tər-ˌtrēt-mənt \

Definition of aftertreatment

: a secondary treatment to which a material (as film or dyed goods) is subjected after the primary treatment is finished

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First Known Use of aftertreatment

1852, in the meaning defined above

History and Etymology for aftertreatment

after- + treatment

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The first known use of aftertreatment was in 1852

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Cite this Entry

“Aftertreatment.” The Dictionary, Merriam-Webster Inc., Accessed 8 December 2019.

Comments on aftertreatment

What made you want to look up aftertreatment? Please tell us where you read or heard it (including the quote, if possible).


to constrict the range or activity of

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