1. a pen with a small metal ball at the tip that rolls ink onto paper

1. having or using a small metal ball at the tip for writing

Examples

• She wrote the letter with a blue ballpoint.
• The ballpoint pen leaked ink in his pocket.
• I prefer ballpoint pens over felt-tip markers for taking notes.
• The ballpoint mechanism allows for smooth writing.
• He clicked the ballpoint pen nervously during the meeting.
• The cheap ballpoint stopped working after a few days.