: 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
Kc Joyner, New York Times, 17 Dec. 2025
The long-time NBC anchor, fill-in, and friend of the show has been named as the official new co-host of the fourth hour of Today.
—Melissa Locker, Southern Living, 9 Dec. 2025
Barry Jackson, Miami Herald, 18 Dec. 2025
In a post-game interview, Minshew spoke about filling in for the injured playmaker, and praised the quarterback for his drive and dedication to the sport, and his team.
—Skyler Caruso, PEOPLE, 18 Dec. 2025
See All Example Sentences for fill-in
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Noun
Cousins is a great fill-in candidate for those who lost Patrick Mahomes.
—Kc Joyner, New York Times, 17 Dec. 2025
The long-time NBC anchor, fill-in, and friend of the show has been named as the official new co-host of the fourth hour of Today.
—Melissa Locker, Southern Living, 9 Dec. 2025
Verb
Riley Patterson, who has filled in for Sanders all season, has connected on 24 of 26 field goals, including a career-long 56 yarder against Pittsburgh on Monday.
—Barry Jackson, Miami Herald, 18 Dec. 2025
In a post-game interview, Minshew spoke about filling in for the injured playmaker, and praised the quarterback for his drive and dedication to the sport, and his team.
—Skyler Caruso, PEOPLE, 18 Dec. 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 19 Dec. 2025.
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