There are 2 main definitions of Pm in English:

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Pm1

Syllabification: Pm

symbol

The chemical element promethium.

Definition of Pm in:

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There are 2 main definitions of Pm in English:

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PM2

Syllabification: PM

abbreviation

1Past Master.
1.1Paymaster.
1.2Police Magistrate.
1.5Prime Minister.
1.6Provost Marshal.

noun

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(plural PMs) informal (In the context of Internet message boards) a private message, sent directly from one user to another: drop me a PM if you want more details

verb

[with object] (PMs, PMing, PMd) informal Back to top  
Send (another user of an Internet message board) a private message: I’ll PM you when I’m back online

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