There are 2 definitions of Mx in English:

Mx1

Syllabification: Mx

abbreviation

Maxwell(s).

Definition of Mx in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day anastrophe
Pronunciation: əˈnastrəfē
noun
the inversion of the usual order of words...

There are 2 definitions of Mx in English:

MX2

Syllabification: MX

abbreviation

Missile experimental (a US intercontinental ten-warhead ballistic missile).