Mm Definition
m, um or other nasalized sound
abbreviation
Millimeter(s)
Webster's New World
Messieurs.
Webster's New World
Majesties.
Webster's New World
(chemistry) Millimole, millimoles.
Wiktionary
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interjection
Used to signify.
Webster's New World
Mm is defined as a way to say yes or maybe to a question.
An example of mm is saying you don't know if you'll be going to an event.
YourDictionary
pronoun
Abbreviation of masorah magna.
Wiktionary