: someone or something that fills in
She performed well as the emergency fill-in.
filled in; filling in; fills in
1
: to enrich (something, such as a design) with detail
2
: to give necessary or recently acquired information to
I'll fill you in
: 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
Georgia Day, Vogue, 24 Nov. 2025
With Wiggins missing his first game of the season, the Heat went with a new starting lineup that featured Ware as the fill-in starter.
—Anthony Chiang, Miami Herald, 22 Nov. 2025
New Atlas, 26 Nov. 2025
Lowe filled in for Campbell on Sunday against the Bengals and has started 21 games with the Patriots over the past three seasons.
—Doug Kyed, Boston Herald, 26 Nov. 2025
See All Example Sentences for fill-in
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Noun
Anywhere between 2–6 weeks, depending on fill-ins.
—Georgia Day, Vogue, 24 Nov. 2025
With Wiggins missing his first game of the season, the Heat went with a new starting lineup that featured Ware as the fill-in starter.
—Anthony Chiang, Miami Herald, 22 Nov. 2025
Verb
The All Indonesia app combines immigration, customs, health and quarantine declarations in one spot, allowing passengers to fill in all their information remotely at home ahead of travel.
—New Atlas, 26 Nov. 2025
Lowe filled in for Campbell on Sunday against the Bengals and has started 21 games with the Patriots over the past three seasons.
—Doug Kyed, Boston Herald, 26 Nov. 2025
See All Example Sentences for fill-in
Cite this Entry
“Fill-in.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fill-in. Accessed 29 Nov. 2025.
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