1. a tool or device used to make creases or folds in paper, fabric, or other materials
2. a person or machine that creates creases
Usage: often used in manufacturing or textile contexts

Examples

• The bookbinder used a creaser to make sharp, precise folds in the paper.
• A bone creaser is a traditional tool for scoring cardstock before folding.
• The textile factory installed an automated creaser to prepare fabric for the next stage of production.
• She ran the creaser along the edge of the cardboard to create a clean crease.
• The creaser left a perfect line down the center of the envelope.