1. a person who follows or traces the movements of people, animals, or objects
2. a device or system that monitors and records the location or movement of something
3. a person skilled at finding and following trails or tracks left by animals or people

Examples

• The wildlife tracker followed the bear’s footprints through the forest.
• She installed a GPS tracker on her phone to monitor her running routes.
• The fitness tracker recorded her daily steps and heart rate.
• An experienced tracker can identify different animal tracks in the mud.
• The package tracker showed that my order would arrive tomorrow.
• The police used a vehicle tracker to locate the stolen car.
• The native guide was an excellent tracker who knew the terrain well.