1
: a line at right angles to a goal line or end line and marking a side of a court or field of play for athletic games
2
a
: a line of goods sold in addition to one's principal line
b
: a business or activity pursued in addition to one's regular occupation
3
a
: the space immediately outside the lines along either side of an athletic field or court
b
: a sphere of little or no participation or activity
—usually used in plural
Examples of sideline in a Sentence
Noun
She makes and sells jewelry as a sideline.
Recent Examples on the Web
Evan Massey, MSNBC Newsweek, 22 Sep. 2025
Trump will also meet with Ukrainian President Volodymyr Zelenskyy on the sidelines this week over promised postwar security guarantees, which Zelenskyy has said are critical to resolving the war with Russia.
—Mariam Khan, ABC News, 22 Sep. 2025
Grant Afseth, MSNBC Newsweek, 16 Sep. 2025
If so, recovery could sideline Burrow for up to three months — essentially the entire regular season.
—Scott Thompson, FOXNews.com, 15 Sep. 2025
See All Example Sentences for sideline
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Noun
In the second quarter, a concerning moment was caught on the Chiefs' sideline.
—Evan Massey, MSNBC Newsweek, 22 Sep. 2025
Trump will also meet with Ukrainian President Volodymyr Zelenskyy on the sidelines this week over promised postwar security guarantees, which Zelenskyy has said are critical to resolving the war with Russia.
—Mariam Khan, ABC News, 22 Sep. 2025
Verb
Washington Wizards wing Bilal Coulibaly will be sidelined to begin the season after undergoing surgery on his right thumb.
—Grant Afseth, MSNBC Newsweek, 16 Sep. 2025
If so, recovery could sideline Burrow for up to three months — essentially the entire regular season.
—Scott Thompson, FOXNews.com, 15 Sep. 2025
See All Example Sentences for sideline
Cite this Entry
“Sideline.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sideline. Accessed 22 Sep. 2025.
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