ef

noun
\ ˈef How to pronounce ef (audio) \

Definition of ef

: the letter f

First Known Use of ef

before the 12th century, in the meaning defined above

Keep scrolling for more

Learn More about ef

Time Traveler for ef

Time Traveler

The first known use of ef was before the 12th century

See more words from the same century

Statistics for ef

Cite this Entry

“Ef.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ef. Accessed 7 Jul. 2020.

More from Merriam-Webster on ef

Rhyming Dictionary: Words that rhyme with ef

Comments on ef

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

WORD OF THE DAY

See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

A More Exception(al) Quiz

  • hot dog  hot dog  hot dog  hot dog cat
  • Which of the following words is not a synonym for ‘a young person’?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Syn City

Test Your Knowledge - and learn some interesting things along the way.

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!