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
When calling Matton out of the blue last summer, Donald was on the hunt for a fill-in at the following week’s BMW International Open in Germany. Brendan Quinn, New York Times, 16 May 2025 Holt was a fill-in for Brian Williams before his abrupt departure in 2015. Stephen Battaglio, Los Angeles Times, 11 May 2025
Verb
The best co-authors complement each other's strengths and fill in the gaps of one another's weaknesses and that was beyond true in working with Jonathan. Lizz Schumer, People.com, 21 May 2025 Who Marsch tips to fill in for Bombito could reveal plenty about who his optimal choice off the bench at centre back will be come 2026. Joshua Kloke, New York Times, 21 May 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 25 May. 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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