1. a person who rollerblades or inline skates
Usage: informal; common in sports and recreation contexts
2. a tool or machine part with a blade or blades
Usage: technical; used in machinery and equipment contexts

Examples

• The blader glided smoothly down the park path.
• Professional bladers compete in speed and trick competitions.
• She became an experienced blader after practicing for several months.
• The blader performed impressive stunts at the skate park.
• Many bladers wear protective gear while skating.