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• am
  am

  verb

  1st person singular present indicative of be.
• Am
  Am

  americium.
• AM
  AM

  abbreviation

  amplitude modulation: a method of impressing a signal on a radio carrier wave by varying its amplitude.
• Am.
  Am.

  abbreviation

  America.
• A/m
  A/m

  ampere per meter.
• a.m.
  a.m.

  abbreviation

  before noon.
• A.M.
  A.M.

  abbreviation

  a.m.
• A/M
  A/M

  abbreviation

  Air Marshal

am

¹ American  

[am, uhm, m] / æm, əm, m /

verb

1. 1st person singular present indicative of be.

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Am ² American  

Symbol, Chemistry.

1. americium.

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AM ³ American  

abbreviation

1. Electronics. amplitude modulation: a method of impressing a signal on a radio carrier wave by varying its amplitude.

2. Radio. a system of broadcasting by means of amplitude modulation.

3. of, relating to, or utilizing such a system.

4. Asian male.

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Am. ⁴ American  

abbreviation

1. America.

2. American.

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A/m ⁵ American  

1. ampere per meter.

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a.m. ⁶ American  

abbreviation

1. before noon.

2. the period from midnight to noon, especially the period of daylight prior to noon.

   Shall we meet Saturday a.m.?

3. a morning newspaper, sometimes issued shortly before midnight.

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A.M. ⁷ American  

abbreviation

1. a.m.

2. Master of Arts.

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am ¹ British  

verb

1. (used with I) a form of the present tense (indicative mood) of be 1

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Am ² British  

symbol

1. americium

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Am. ³ British  

abbreviation

1. America(n)

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am ⁴ British  

abbreviation

1. Armenia

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A/M ⁵ British  

abbreviation

1. Air Marshal

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a.m. ⁶ British  

abbreviation

1. ante meridiem Compare p.m.

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AM ⁷ British  

abbreviation

1. associate member

2. Assembly Member (of the National Assembly of Wales)

3. Albert Medal

4. Master of Arts

5. Also: am.  amplitude modulation

6. See a.m.

7. Member of the Order of Australia

8. Armenia (international car registration)

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am ⁸ British  

abbreviation

1. See AM

2. See a.m.

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AM Scientific  

1. Abbreviation of amplitude modulation

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Usage

The abbreviation a.m. for Latin ante merīdiem, meaning “before noon,” refers to the period from midnight until noon. One minute before noon is 11:59 a.m. One minute after noon is 12:01 p.m. Many people distinguish between noon and midnight by saying 12 noon and 12 midnight. Expressions combining a.m. with morning ( 6 a.m. in the morning ) and p.m. with afternoon, evening, or night ( 9 p.m. at night ) are redundant and occur most often in casual speech and writing. Both a.m. and p.m. sometimes appear in capital letters, especially in printed matter.

Etymology

Origin of am¹

First recorded before 900; Middle English; Old English am, eam, eom; cognate with Gothic im, Old Norse, Armenian em, Old Irish am (from unattested esmi ), Attic Greek eimí, Aeolic Greek émmi, Doric Greek ēmí (all from prehistoric Greek esmi ), Hittite esmi, early Lithuanian esmì, Old Church Slavonic yesmĭ, Albanian jam (from unattested esmi ), Sanskrit ásmi, from unattested Proto-Indo-European ésmi, from root es- “to be” + -m 1st person singular + -i, present-time marker; cf. is

Origin of AM³

First recorded in 1935–40

Origin of a.m.⁶

From Latin ante merīdiem

Origin of A.M.⁷

A.M. ( def. 2 ) from Latin Artium Magister

Example Sentences

Something you should know about me: I am, deeply and sincerely, a sketch comedy nerd.

From Salon • May 25, 2026

I am unlikely to deviate from a system when I see things laid out in front of me.

From Slate • May 24, 2026

"I am super proud of my performance, and hopefully the boxing world embraces me as a boxer. I am amazingly happy to be here," Verhoeven said.

From BBC • May 23, 2026

“I will never be able to make sense of this loss but I am thankful that we had found a way to become friends.”

From The Wall Street Journal • May 23, 2026

“I am the liaison assigned to manage the Hello Girls,” he said.

From "The Brightwood Code" by Monica Hesse

Related Words

• dawn