p.m.

• PM, P. M., P.M., p. m.
• pm (for "post meridiem")
• P, p (for "post meridiem"; chiefly US)

• IPA^(key): /piːˈɛm/

• Audio (US)

  (file)

• Rhymes: -ɛm

Abbreviation of Latin post meridiem (“after noon”).

p.m.

1. (used after the hour) In the 12-hour period from noon to midnight (the latter half of the day) when using the 12-hour clock.
   • 1971, U.S. Department of Commerce, Hourly Precipitation Data: Ohio, page 14:

     HOURLY PRECIPITATION [...] 9 PM THROUGH 12 PM (MIDNIGHT) ZERO DAILY TOTAL

   • 2007, Khurana Rohit, Number Game 4, page 144:

     We never say 12 a.m. or 12 p.m. It's either 12 midnight or 12 noon, respectively.

   • 2009, Robert Bill, Medical Mathematics and Dosage Calculations for Veterinary Professionals, page 348:

     The 12-hour clock uses A.M. for the morning hours of midnight (12:00 A.M.) to almost noon (11:59 A.M.) and the P.M. designation for the hours from noon (12:00 P.M.) to almost midnight (11:59 PM).

   • 2015, Arhlene A. Flowers, Global Writing for Public Relations, page 141:

     The 12-hour clock, which is used in the U.S., Canada, and a few other countries, divides time into two cycles: a.m. (ante meridiem, Latin for before midday) from midnight, 12 a.m., to 11:59 a.m.; and p.m. (post meridiem, Latin for after midday) from noon, 12 p.m., to 11:59 p.m.

   • 2016, VOA Learning English (public domain)

     Anna. — Yes, Ms. Weaver. — Are you busy? — Yes, Ms. Weaver. I am busy. — My office. 5:00 p.m. — 5:00 p.m.

     Audio (US)

     (file)

   • 2023 August 3, Yeh Chen, Bernadette Hsiao, “4 found without vital signs after vehicle plunges into rural Taoyuan valley”, in Focus Taiwan‎, archived from the original on 03 August 2023, Society‎:

     The Taoyuan City Fire Department said that two others, a man and a woman, were pulled from the vehicle alive after rescuers were called to the scene of the accident near Sbunaw Bridge in Fuxing District at 12:27 p.m.

• As seen in the quotes above, "12 p.m." has sometimes been used to mean either noon or midnight. However, the National Institute of Standards and Technology contends that those uses are incorrect.
• Some argue that it should not be used in English as a noun meaning "afternoon" on account of the fact that it is an abbreviation for a Latin adverbial phrase.

• in the afternoon

• a.m.
• in the forenoon

Abbreviation of Latin post mortem (“after death”).

p.m.

1. after death

• MP, Mp, mp

p.m. (invariable, not comparable)

1. p.m. (after 12 o’clock)

   Antonyms: a.m., da manhã

• da tarde / da noite (depois do meio dia)