There are 2 definitions of mW in English:

mW1

Syllabification: mW

abbreviation

Milliwatt(s).

Definition of mW in:

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Word of the day ween
Pronunciation: wēn
verb
be of the opinion; think or suppose

There are 2 definitions of mW in English:

MW2

Syllabification: MW

abbreviation

Megawatt(s).

Definition of mW in: