\ ˈfil-ˌin How to pronounce fill-in (audio) \

Definition of fill-in

 (Entry 1 of 2)

: someone or something that fills in

fill in

filled in; filling in; fills in

Definition of fill in (Entry 2 of 2)

transitive verb

1 : to enrich (something, such as a design) with detail
2 : to give necessary or recently acquired information to I'll fill you in

intransitive verb

: to fill a vacancy usually temporarily interns filled in for regular staffers

Keep scrolling for more

Examples of fill-in in a Sentence

Verb my friend quickly filled me in on the portion of the movie that I had missed she's only filling in while the regular secretary is on vacation
Recent Examples on the Web: Verb Depending on how much of our manufacturing capacity has been shut, this backlog will be filled in a span of days, weeks, or months. Dean Baker, The New Republic, "Building an Economy That Works Again," 14 May 2020 But who will fill in at left guard, Tope Imade or Tyler Johnson? Alex Briseno, Dallas News, "5 key issues for Texas heading into next season: Who can solve Longhorns’ punt returning problems?," 14 May 2020 Other reporters will fill in on my weekly furlough day. Julia Wick, Los Angeles Times, "Newsletter: A special election and more in the week ahead," 11 May 2020 The basement, which is currently filled with water, will be filled in. Anna Beahm |, al, "Ramsay McCormack Building to be torn down, redeveloped," 22 Apr. 2020 The runners, which root and make new plants, will fill in the rest of the space and result in a dense planting. oregonlive, "New to Oregon gardening? Strawberries promise a sweet start," 7 Apr. 2020 Renato Brown The redshirt sophomore is filling in for Tyler Haycraft at right tackle and made a good impression playing with the starters throughout the spring. Cameron Teague Robinson, The Courier-Journal, "Who stood out for U of L football this spring? Bryan Brown, Dwayne Ledford weigh in," 6 Apr. 2020 The five-member Alaska Supreme Court is scheduled to consider the recall March 25, and chief clerk Meredith Montgomery said retired Supreme Court Justice Robert Eastaugh (an appointee of former Gov. Wally Hickel) will fill in. James Brooks, Anchorage Daily News, "Alaska’s chief justice recuses himself from the Dunleavy recall," 3 Mar. 2020 Chastain will fill in for Newman beginning with Sunday's NASCAR Cup Series race at Las Vegas Motor Speedway. Ellen J. Horrow, USA TODAY, "Ross Chastain will drive Ryan Newman's No. 6 Ford at next NASCAR Cup race at Las Vegas," 19 Feb. 2020

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

See More

First Known Use of fill-in


1917, in the meaning defined above


1840, in the meaning defined at transitive sense 1

Keep scrolling for more

Learn More about fill-in

Time Traveler for fill-in

Time Traveler

The first known use of fill-in was in 1840

See more words from the same year

Statistics for fill-in

Cite this Entry

“Fill-in.” Dictionary, Merriam-Webster, Accessed 3 Jun. 2020.

Keep scrolling for more

More Definitions for fill-in


How to pronounce fill in (audio)

English Language Learners Definition of fill-in

: someone who takes the place of another person who is away for a short time : someone who fills in for someone else

More from Merriam-Webster on fill-in

Thesaurus: All synonyms and antonyms for fill-in

Rhyming Dictionary: Words that rhyme with fill-in

Comments on fill-in

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


See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

May 2020 Words of the Day Quiz

  • a blooming wisteria tree
  • Which is a synonym of exiguous?
Spell It

Can you spell these 10 commonly misspelled words?


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

Love words? Need even more definitions?

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