Sniffer

Pronunciation: /ˈsnɪfər/

Sniffer (noun)

  1. An animal, often a dog, that uses smell to find something hidden or far away.
  2. A small device that detects certain gases or chemicals by sensing their smell or particles.
  3. A computer tool that watches data moving across a network to find problems or suspicious activity.

Examples

  • The sniffer follows the trail through the grass.
  • A sniffer finds hidden items by scent.