American English

Definition of MSM noun from the Oxford Advanced American Dictionary

 

MSM

 noun
noun
NAmE//ˌɛm ɛs ˈɛm//
 
[uncountable] (computing)
 
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the abbreviation formainstream media(traditional media such as newspapers and broadcasting) The line is beginning to blur between influential blogs and MSM. He criticized the MSM's lack of interest in the story.
See the Oxford Advanced Learner's Dictionary entry: MSM