the GNU version of the Collaborative International Dictionary of English
n. a pen which has a small metal ball as point of transfer of ink to paper, at the tip of a cylandrical and non-refillable reservoir of ink; -- short for ballpoint pen.
The Century Dictionary and Cyclopedia
n. An attachment to a compass or pair of dividers, fitted to one leg to form a seat over a hole when a circle is to be described about the hole.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a pen that has a small metal ball as the point of transfer of ink to paper
Word Usage
"The note was always written in ballpoint pen on a small slip of white paper, affixed with cellophane tape."