Definition

1. Noun:
   • A writing instrument that dispenses ink through a small, rotating metal ball at its tip onto a writing surface.

Usage

• The word "ballpoint" is used to refer to a common, everyday pen. It is often used in its full form, "ballpoint pen," but "ballpoint" alone functions as a noun.
• It is a countable noun (e.g., , ).

Examples

• Noun:
  • Please sign the form with a black ballpoint.
  • I always lose my ballpoints.
  • The contract requires a signature in ballpoint ink.

Advanced Usage

• "ballpoint" as a modifier: The term can be used attributively to describe other nouns.
  • ballpoint refill (a replacement ink cartridge for a ballpoint pen).
  • ballpoint handwriting (the style of writing produced by such a pen).

Variants and Related Words

• Ballpoint pen: The full, more common term.
• Biro: A proprietary name (from the inventor László Bíró) that is often used generically, especially in British English.
• Ballpen: A common variant, especially in Asian English.

Synonyms

• Biro (trademark, common noun)
• Ballpen
• Ball-point pen

Antonyms

• Fountain pen: A pen that uses liquid ink drawn from a reservoir.
• Gel pen: A pen that uses a water-based gel ink.
• Felt-tip pen: A pen with a porous tip.

Notes

• The invention of the ballpoint was a significant advancement over fountain pens, as it is less prone to leaking and can write on more surfaces.
• The key component is the ballpoint itself—a tiny metal sphere that rolls to pick up ink from a reservoir and deposit it on paper.

Noun

1. a pen that has a small metal ball as the point of transfer of ink to paper