'Pedometer' definitions:

Definition of 'pedometer'

From: WordNet
noun
Measuring instrument for recording the number of steps taken in walking

Definition of 'Pedometer'

From: GCIDE
  • Pedometer \Pe*dom"e*ter\, n. [Pedi-, pedo- + -meter: cf. F. p['e]dom[`e]tre.] (Mech.) An instrument for including the number of steps in walking, and so ascertaining the distance passed over. It is usually in the form of a watch; an oscillating weight by the motion of the body causes the index to advance a certain distance at each step. [1913 Webster] Pedometric