Dictionary

a.m. en · ADJ

Pronunciation

• (US) audio

Etymology

Abbreviation of ante meridiem (“before noon”).

Meanings

1. (abbreviation, alt-of, initialism, not-comparable) Initialism of ad modum.
   alt of ad modum

Forms

a.m. en · ADV

Pronunciation

• (US) audio

Etymology

Abbreviation of ante meridiem (“before noon”).

Meanings

1. (not-comparable, used after the hour) In the 12-hour period from midnight to noon (the first half of the day) when using the 12-hour clock.
   • Some AI startups are taking the workplace back to the dark ages, adopting the Chinese “9-9-6 work schedule” in which employees toil from 9:00 a.m. to 9:00 p.m. six days a week from Monday to Saturday. 2025 August 4, Bryan Robinson, “The ‘9-9-6 Work Schedule’ Could Be Coming To Your Workplace Soon”, in Forbes, archived from the original on 07 Aug 2025:
   • One of the most common night shifts is the 12 a.m.-to-8 a.m. shift. 2001, Customs Service effects of proposed legislation on officers' pay, United States General Accounting Office, page 45:
   • The following daylight peaks are identified around lunchtime, from 12 am to 1 pm, while for weekend days, the curve show several daylight peaks from 7 am to late lunchtime, around 1 pm. 2021, Jukka Heinonen, Ortzi Akizu-Gardoki, Sanna Ala-Mantila, Energy Efficient Cities of Today and Tomorrow, page 196:
   • 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). 2009, Robert Bill, Medical Mathematics and Dosage Calculations for Veterinary Professionals, page 348:
   • We never say 12 a.m. or 12 p.m. It's either 12 midnight or 12 noon, respectively. 2007, Khurana Rohit, Number Game 4, page 144:
   • Greenfield … Monday thru Friday, 9 to 12 a.m. 1967, United States Travel Service, Plant Tours for International Visitors to the United States, page 49
   • 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. 2015, Arhlene A. Flowers, Global Writing for Public Relations, page 141:

Forms

Antonyms

in the afternoon · p.m.

Synonyms

in the forenoon

Translations (59)

fr du matin (before noon) · ms pagi (before noon) · eo a.t.m. (before noon) · fi ap. (before noon) · ko 오전에 (before noon) · ar قَبْلَ الظُّهْر (before noon) · tt иртәнге (before noon) · ht di maten (before noon) · is fyrir hádegi (before noon) · is a.m. (before noon) · ar صَبَاحًا (before noon) · es de la mañana (before noon) · fa ق.ظ (before noon) · fi e. pp. (before noon) · mn ҮӨ (before noon) · nv abínígo neeznáágóó oolkiłgo... (before noon) · tr öğleden önce (before noon) · tr ÖÖ. (before noon) · cs dopoledne (before noon) · de morgens (before noon) · fr avant-midi (before noon) · hi सुबह के (before noon) · ru до полу́дня (before noon) · he לפנה״צ (before noon) · ti ንጉሆ ሰዓት (before noon) · ar ص (before noon) · pt a.m. (before noon) · tt төнге (before noon) · tt таңгы (before noon) · pl przed południem (before noon) · el π.μ. (before noon) · tt өйләгә кадәр (before noon) · cmn 上午 (before noon) · ru утра́ (before noon) · ko 오전 (before noon) · cy y.b. (before noon) · gd sa mhadainn (before noon) · ur صبح کے (before noon) · nl 's ochtends (before noon) · ht nan maten (before noon) · fi ap (before noon) · ru но́чи (before noon) · hu délelőtt (before noon) · es a. m. (before noon) · he לִפְנֵי הַצָּהֳרַיִם (before noon) · is árdegis (before noon) · sv fm (before noon) · eo atm. (before noon) · ja 午前 (before noon) · fa پیشین (before noon) · de vormittags (before noon) · ht maten (before noon) · tl n.u. (before noon) · pt da manhã (before noon) · is f.h. (before noon) · kk таң (before noon) · gd m (before noon) · nl 's morgens (before noon) · fa پیش از نیمروز (before noon)