noun, verb, penned, pen⋅ning.| 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. | ball-point 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. | stylus (def. 3). |
| 11. | Ornithology.
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| 12. | something resembling or suggesting a feather or quill. |
| 13. | Zoology. an internal, corneous or chitinous, feather-shaped structure in certain cephalopods, as the squid. |
| 14. | to write with or as with a pen; put down in writing: to pen an essay. |
| 15. | to draw with or as with a pen: to pen a sketch. |

noun, verb, penned or pent, pen⋅ning.| 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. |
| 7. | to confine in or as in a pen. |

pen 2 (pěn) n.
To confine in or as if in a pen. See Synonyms at enclose. [Middle English, from Old English penn.] |
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