pm

or PM

Digital Technology.

noun plural pms, pm's.

a private message sent to another user of a social media service or private messaging service: How do I send a pm to the moderator of the message board?

verb (used with object) pm'd or pmed, pm'ing, or pming.

to send a private message to (another user of such a service).

QUIZZES

TAKE THIS QUIZ TO SEE WHAT YOU KNOW ABOUT HIGH SCHOOL PUNCTUATION!

Commas mark divisions in sentences. Periods end declarative sentences. Apostrophes show possession. Easy, right? Well, punctuation can get pretty tricky—fast. Think you got what it takes to be a punctuation expert? Take our quiz to prove it!
Question 1 of 10
Which of the options below is the best punctuation for the sentence? It__s your turn to pick the movie __ but your sister gets to pick the board game we _ re going to play.

Definition for pm (2 of 5)

Pm

Symbol, Chemistry.

Definition for pm (3 of 5)

Definition for pm (4 of 5)

p.m.

after noon.
the period between noon and midnight.

Origin of p.m.

From the Latin word post merīdiem

usage note for p.m.

See a.m.

Definition for pm (5 of 5)

P.M.

or PM


Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for pm

British Dictionary definitions for pm (1 of 5)

pm1

abbreviation for

premium

British Dictionary definitions for pm (2 of 5)

pm2

the internet domain name for

St Pierre and Miquelon

British Dictionary definitions for pm (3 of 5)

Pm

the chemical symbol for

promethium

British Dictionary definitions for pm (4 of 5)

PM

abbreviation for

Prime Minister
Past Master (of a fraternity)
Paymaster
Postmaster
military Provost Marshal

British Dictionary definitions for pm (5 of 5)

p.m.

P.M., pm or PM


abbreviation for

(indicating the time period from midday to midnight) post meridiemSee a.m.
post-mortem (examination)

Word Origin for p.m.

(sense 1) Latin: after noon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for pm (1 of 2)

pm

abbr.

picometer

Medical definitions for pm (2 of 2)

Pm

The symbol for the elementpromethium
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for pm (1 of 2)

Pm

The symbol for promethium.

Scientific definitions for pm (2 of 2)

promethium
[ prə-mēthē-əm ]

Pm

A radioactive metallic element of the lanthanide series. Promethium does not occur in nature but is prepared through the fission of uranium. It has 17 isotopes, one of which is used to make long-lived miniature batteries that work at extreme temperatures for up to five years. The longest-lived isotope, Pm 147, has a half-life of 2.5 years and is used as a source of beta rays. Atomic number 61; melting point 1,168°C; boiling point 2,460°C; valence 3. See Periodic Table.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.