'ballpoint pen' definitions:

Definition of 'ballpoint pen'

From: WordNet
noun
A pen that has a small metal ball as the point of transfer of ink to paper [syn: ballpoint, ballpoint pen, ballpen, Biro]

Definition of 'ballpoint pen'

From: GCIDE
  • ballpoint \ballpoint\ 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.
  • Syn: ballpoint pen, ballpen, Biro. [WordNet 1.5]