fill-in

1 of 2

noun

: someone or something that fills in

fill in

2 of 2

verb

filled in; filling in; fills in

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

Examples of fill-in in a Sentence

Noun I'm just a fill-in, so I have no idea where office supplies are kept 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Noun
Bruce Pearl the fill-in College coaches have to get their start somewhere. John Raby, Chicago Tribune, 17 Mar. 2025 Clarkson came back for a couple of days, but has been MIA since March 6 while an ever-changing cast of fill-in hosts has taken over her show. Christie D’zurilla, Los Angeles Times, 13 Mar. 2025
Verb
Proliferation: Between days four and 21, various cells, including skin and immune cells, work together to close and fill in the injury and reestablish skin function. Angelica Bottaro, Verywell Health, 11 Mar. 2025 The Raiders now have a huge void to fill in the middle of that side of the ball. Vic Tafur, The Athletic, 11 Mar. 2025 See All Example Sentences for fill-in

Word History

First Known Use

Noun

1917, in the meaning defined above

Verb

1840, in the meaning defined at transitive sense 1

Time Traveler
The first known use of fill-in was in 1840

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Cite this Entry

“Fill-in.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fill-in. Accessed 23 Mar. 2025.

Kids Definition

fill in

verb
1
: to furnish with specified information
fill in an application
filled us in on the latest news
2
: to fill a vacancy usually temporarily : substitute
filled in during the emergency
Last Updated: - Updated example sentences
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