pen

¹ American  

[pen] / pɛn /

noun

1. any of various instruments for writing or drawing with ink or a similar substance.

2. a detachable metal penpoint, filled by dipping or with a quill; nib.

3. such a penpoint with its penholder.

4. fountain pen.

5. ballpoint pen.

6. the pen as the instrument of writing or authorship.

   The pen is mightier than the sword.

7. a person's style or quality of writing.

   He writes with a witty, incisive pen.

8. a writer.

   I leave this story to abler pens.

9. the profession of writing.

   a master of the pen.

10. a pen-shaped device having a cartridge filled with a drug or medication.

    an insulin pen with disposable needles.

11. Computers. stylus.

12. Ornithology.

    1. a quill.

    2. a pinfeather.

13. something resembling or suggesting a feather or quill.

14. Zoology. an internal, corneous or chitinous, feather-shaped structure in certain cephalopods, as the squid.

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verb (used with object)

penned, penning

1. to write with or as with a pen; put down in writing.

   to pen an essay.

2. to draw with or as with a pen.

   to pen a sketch.

pen ² American  

[pen] / pɛn /

noun

1. a small enclosure for domestic animals.

2. animals so enclosed.

   We have a pen of twenty sheep.

3. an enclosure used for confinement or safekeeping.

   We have built several pens to hold our harvest of corn.

4. playpen.

5. bull pen.

6. a dock having a protective concrete structure overhead, used to service and repair submarines.

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verb (used with object)

penned, pent, penning

1. to confine in or as in a pen.

pen ³ American  

[pen] / pɛn /

noun

Slang.

1. penitentiary.

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pen ⁴ American  

[pen] / pɛn /

noun

1. a female swan.

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pen- ⁵ American  

1. variant of pene- before a vowel.

   penannular.

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Pen. ⁶ American  

Or pen.

abbreviation

1. peninsula.

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P.E.N. ⁷ American  

abbreviation

1. International Association of Poets, Playwrights, Editors, Essayists, and Novelists.

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pen ¹ British  

/ pɛn /

noun

1. an implement for writing or drawing using ink, formerly consisting of a sharpened and split quill, and now of a metal nib attached to a holder See also ballpoint fountain pen

2. the writing end of such an implement; nib

3. style of writing

4. 1. writing as an occupation

   2. the written word

      the pen is mightier than the sword

5. the long horny internal shell of a squid

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verb

1. (tr) to write or compose

pen ² British  

/ pɛn /

noun

1. an enclosure in which domestic animals are kept

   sheep pen

2. any place of confinement

3. a dock for servicing submarines, esp one having a bombproof roof

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verb

1. (tr) to enclose or keep in a pen

PEN ³ British  

/ pɛn /

acronym

1. International Association of Poets, Playwrights, Editors, Essayists, and Novelists

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Pen. ⁴ British  

abbreviation

1. Peninsula

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pen ⁵ British  

/ pɛn /

noun

1. informal short for penitentiary

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pen ⁶ British  

/ pɛn /

noun

1. a female swan

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pen Idioms  

1. see slip of the lip (pen).

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Other Word Forms

• penlike adjective
• penner noun

Etymology

Origin of pen¹

First recorded in 1250–1300; Middle English penn(e), from Old French penne “pen, feather,” from Late Latin penna “pen,” from Latin penna, pinna “feather, wing”

Origin of pen²

First recorded before 1000; (noun) Middle English penne, Old English penn (in compounds); perhaps akin to pin; (verb) Middle English pennen, derivative of the noun

Origin of pen³

An Americanism dating back to 1880–85; shortened form

Origin of pen⁴

First recorded in 1540–50; origin uncertain

Example Sentences

He has a notebook, a pen, a flashlight and about 15 hours’ worth of oxygen.

From The Wall Street Journal • Mar. 27, 2026

The Danish drugmaker on Thursday announced the approval of a 7.2 mg dose called Wegovy HD that will be available as a single-dose pen in the U.S.

From MarketWatch • Mar. 19, 2026

I held pen and paper in my hand, ordering my children to be quiet as they moved between playing and watching the screen.

From Salon • Mar. 7, 2026

Back at her family home, Adriana Briceño holds up an old T-shirt with a few sentences scrappily scrawled on it in pen.

From BBC • Mar. 4, 2026

Dodger and Elwood ran in circles in their pen, heads and tails up, ears swiveling, eyes darting back and forth.

From "Two Degrees" by Alan Gratz

Related Words

• fountain pen
• marker
• stick