Definition of "ballpoint pen" [ballpoint pen]

• A pen, similar in size and shape to a pencil, having an internal chamber filled with a viscous, quick-drying ink that is dispensed at the tip during use by the rolling action of a metal sphere (around 0.7 mm to 1 mm in diameter). (noun)

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• "Deborah was talking to someone who looked like a student, and Vince Masuoka was squatting beside the left leg of the body and poking carefully with a ballpoint pen at something on the ankle."
• "“Ah-huh,” Jake said, taking out a ballpoint pen and notepad."
• "Papers lay scattered over the desk, three bankbooks had fallen to the floor, and a Mastercard bill and a Visa bill sat on top of the monitor, some columns of addition in ballpoint pen on the itemization page x-ed out with so much force the ink left deep grooves."