fido
noun
fido is a noun meaning “A coin that is defective, having been incorrectly minted, often prized by collectors” (English Wiktionary, September 2026). It is spelled F-I-D-O and has 2 syllables, and it appears about once in every 2 million words in written English (wordfreq, 2021 data, counting Fido, the name). The plural of fido is fidos.
What does fido mean?
noun
- 1
A coin that is defective, having been incorrectly minted, often prized by collectors.
noun
- 1
Acronym of flight dynamics officer.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How do you pronounce fido?
Fido has 2 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of fido
- fidos plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is fido?
Fido appears about once in every 2 million words in written English, the 44,767th most frequent word form in the list. The list counts every capitalisation together, so this includes Fido, the name.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Fido in Spanish, French, German and Portuguese
In the sense incorrectly minted coin:
| Language | Words |
|---|---|
| German | Fehlprägung |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does fido come from?
An acronym of the words freaks, irregulars, defects, oddities, from the 1960s.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).