1. a notebook or booklet, especially one used for writing notes or keeping records
Usage: chiefly historical or literary; borrowed from French
2. a bound set of pages or sheets; a quire or gathering of paper
Usage: technical or printing term; archaic

Examples

• The student kept a cahier for recording observations during the science experiment.
• The artist filled several cahiers with sketches and design ideas.
• In the 18th century, a cahier was a formal written statement of grievances presented to the king.
• The printer carefully arranged the cahiers before binding them into the final book.
• She purchased a leather-bound cahier to use as a travel journal.