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
Dooley, the voice of the Yard Goats, made his Major League broadcasting debut in 2023 as a fill-in announcer for the Colorado Rockies. Kels Dayton, Hartford Courant, 27 Mar. 2025 Head coach Tom Thibodeau said McBride, who was the fill-in starter for Jalen Brunson (right ankle sprain) before his own injury, is a limited participant in practice. Kristian Winfield, New York Daily News, 26 Mar. 2025
Verb
The plot, too, is threadbare to the point of incoherence, with a slew of overqualified performers — including Imelda Staunton and Lesley Manville — left to fill in the gaps as fairies, man-crows, and anthropomorphized mushroom caps. Staff Author, EW.com, 22 Mar. 2025 Verizon isn't the only carrier focused on providing this kind of satellite connectivity to fill in the gaps in terrestrial cellular network coverage. Julian Chokkattu, WIRED, 22 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

Browse Nearby Words

Cite this Entry

“Fill-in.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fill-in. Accessed 2 Apr. 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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