fido

noun
fi·​do | \ ˈfī-(ˌ)dō How to pronounce fido (audio) \
plural fidos

Definition of fido

: a coin having a minting error

Examples of fido in a Sentence

Recent Examples on the Web In addition to bringing fido, Amtrak customers riding Acela trains can reserve their seats in advance and see how full the train is before booking. Alison Fox, Travel + Leisure, "Pets Will Now Be Welcome on Amtrak's Weekday Acela Trains," 4 Mar. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fido.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of fido

1967, in the meaning defined above

History and Etymology for fido

freaks + irregulars + defects + oddities

Keep scrolling for more

Learn More about fido

Statistics for fido

Last Updated

19 Mar 2021

Cite this Entry

“Fido.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fido. Accessed 19 Apr. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Comments on fido

What made you want to look up fido? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

The Exceptions Quiz III

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!