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Definition of sniffer

sniffer

/ˈsnɪf.ər/
snif · fer
Plural:sniffers
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sniffer Lexical Profile

sniffer Game Scores & Validity

• noun

1

A person or animal that perceives or searches for something by smell, or that inhales a substance through the nose.

Example

"The airport security officer walked along the luggage carousel with a trained sniffer."

2

An electronic device or instrument used to detect and measure trace gases, vapors, or leaks in the air.

Example

"The technician used a portable gas sniffer to locate the source of the natural gas leak."

3

A software program or hardware device that monitors, intercepts, and logs data traffic passing over a digital network.

Example

"The network administrator ran a packet sniffer to diagnose the sudden drop in bandwidth."

4

A person's or animal's nose (informal).

Example

"My hound has a keen sniffer and can track a scent across miles of forest."

Synonyms
View all synonyms for sniffer

• Rhymes for sniffer

• Nearby Words

snidely
snideness
sniff
sniffer
sniffle
sniffler
sniffles

Cite this Entry

Wordmom. (2026). Definition of Sniffer. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/sniffer
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