There are 2 main definitions of Mt in English:

Mt1

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abbreviation

1.1 [in place names] Mount: Mt Everest

symbol

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The chemical element meitnerium.

Definition of Mt in:

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There are 2 main definitions of Mt in English:

MT2

Line breaks: MT

abbreviation

1.2Modified tweet (a retweeted posting on the social media website Twitter in which the original content has been altered in some way).

Definition of Mt in: