Definition of ballpoint noun from the Oxford Advanced Learner's Dictionary

 

ballpoint

 noun
noun
BrE BrE//ˈbɔːlpɔɪnt//
 
; NAmE NAmE//ˈbɔːlpɔɪnt//
 
(also ballpoint pen) In the office
 
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a pen with a very small metal ball at its point, that rolls ink onto the paper compare Biro™ See related entries: In the office
See the Oxford Advanced American Dictionary entry: ballpoint