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 adverts and access premium resources

Word of the day fioritura
Pronunciation: fɪˌɔːrɪˈt(j)ʊərə
noun
an embellishment of a melody...

There are 2 definitions of Mx in English:

MX2

Syllabification: MX

abbreviation

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