<p><strong>Noun</strong></p><ul><li>any of various instruments for writing or drawing with ink or a similar substance.</li><li>a detachable metal penpoint, filled by dipping or with a quill; nib.</li><li>such a penpoint with its penholder.</li><li>fountain pen.</li><li>ballpoint pen.</li><li>the pen as the instrument of writing or authorship: The pen is mightier than the sword.</li><li>a person's style or quality of writing: He writes with a witty, incisive pen.</li><li>a writer: I leave this story to abler pens.</li><li>the profession of writing: a master of the pen.</li><li>a pen-shaped device having a cartridge filled with a drug or medication: an insulin pen with disposable needles.</li><li>stylus (def 3).</li><li>a quill.</li><li>a pinfeather.</li><li>something resembling or suggesting a feather or quill.</li><li>an internal, corneous or chitinous, feather-shaped structure in certain cephalopods, as the squid.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) penned, penning.</li><li>to write with or as with a pen; put down in writing: to pen an essay.</li><li>to draw with or as with a pen: to pen a sketch.</li></ul>