: 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
Richard Wagoner, Daily News, 16 Feb. 2026
Duval County has two lines at early voting sites, one for ExpressVote and the other for a traditional fill-in-the-blanks ballot.
—Anthony Man, Sun Sentinel, 15 Feb. 2026
Abbey Mastracco, New York Daily News, 22 Feb. 2026
The positions, which the release said would be filled in March, each include a one-year term.
—Post-Tribune, Chicago Tribune, 22 Feb. 2026
See All Example Sentences for fill-in
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Noun
Merrill is not new to the station, having done weekends and fill-ins previously.
—Richard Wagoner, Daily News, 16 Feb. 2026
Duval County has two lines at early voting sites, one for ExpressVote and the other for a traditional fill-in-the-blanks ballot.
—Anthony Man, Sun Sentinel, 15 Feb. 2026
Verb
In an era when teams typically carry more pitchers than position players, versatility allows managers to make favorable substitutions off the bench and to fill in the gaps in the event of injuries or ineffectiveness.
—Abbey Mastracco, New York Daily News, 22 Feb. 2026
The positions, which the release said would be filled in March, each include a one-year term.
—Post-Tribune, Chicago Tribune, 22 Feb. 2026
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 23 Feb. 2026.
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