1. making lines or wrinkles in something by folding or pressing
Usage: present participle of crease
2. becoming marked with lines or wrinkles
Usage: present participle of crease
3. laughing very hard
Usage: British informal

1. the action of making folds or wrinkles in something

Examples

• She was creasing the paper to make origami.
• His shirt was creasing from sitting too long.
• The creasing of the fabric made it look wrinkled.
• Careful creasing is important for neat gift wrapping.
• The comedy show had everyone creasing with laughter.
• Stop creasing the pages of that book!
• The creasing tool helped make sharp folds.