pm

1 of 3

abbreviation (1)

1

phase modulation

2

premium

Pm

2 of 3

symbol

promethium

PM

3 of 3

abbreviation (2)

1

particulate matter

—often used with a number indicating the size of the particulate

When EPA first regulated particulates in 1987, they focused on PM10, or particulates 10 microns and smaller.

—Emily Monosson

… the [Chinese] government has built a nationwide network of monitors tracking levels of PM2.5—the tiny combustion particles that penetrate deep into the body, causing not only breathing problems but also heart attacks, strokes and neurological ailments.

—Beth Gardiner

2

paymaster

3

permanent magnet

4

postmaster

They include [Postmaster] Wallace, an assistant PM, four clerks and five carriers, a rural carrier and a custodial employee.

—Postal Life

5

or p.m. or British pm post meridiem

—often not cap and often punctuated

6

postmortem

7

prime minister

Yesterday Prime Minister (PM) Shinzo Abe of Japan addressed a joint session of Congress. This was the first time a sitting Japanese PM addressed both the House of Representatives and the Senate.

—Newstex Blogs: Rep. Brad Ashford on Facebook (Nebraska)

8

provost marshal

The guard on the gate, the military and civilian police on the street, the desk sergeant, and ultimately the installation provost marshal (PM) collect and disseminate information on potential threats to their installation …

—Jeffery Porter and James Crumley

Medical Definition

pm

1 of 3 abbreviation

premolar

Pm

2 of 3 symbol

promethium

PM

3 of 3 abbreviation

1

[Latin post meridiem] after noon

2

postmortem