pedometer
/pɛdəˈmɛtər/Definitions
1. noun
A device used to measure the number of steps taken, typically worn on the foot or clipped to clothing.
“After purchasing a new pedometer, she began tracking her daily steps and saw significant improvements in her physical fitness.”
2. noun
A person who measures distances, especially by walking or running, especially to measure the distance of a course.
“The experienced marathon runner served as a pedometer to help the new course organizers measure the exact distance of the route.”