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Definition of fido

fido

/ˈfaɪ.doʊ/
fi · do
Plural:fidos
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fido Lexical Profile

fido Game Scores & Validity

• noun

1

A stereotypical or generic name used to refer to any domestic dog (often capitalized as 'Fido').

Example

"Make sure to keep Fido on a leash while walking through the public park."

2

American A coin that has been struck with a minting error or defect, making it a curiosity or collectible item among numismatists.

Example

"The coin collector examined his pocket change closely, hoping to spot a valuable fido."

Synonyms
View all synonyms for fido

• Rhymes for fido

• Nearby Words

fidgeter
fidgetiness
fidgety
fido
fief
fiefdom
field

Word Origin & Etymology

As a quintessential name for a pet dog, Fido derives from the Latin 'fidus' (faithful) via Italian 'fido', popularized in the United States by Abraham Lincoln's family dog in the 1850s. The numismatic sense is a 20th-century acronym for 'Freaks, Irregulars, Defects, and Oddities'.

Cite this Entry

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