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
Bruce Feldman, New York Times, 28 May 2026
If concerns about the monetization of artificial intelligence investments and the wait for new revenue streams were keeping you on the sidelines, then two major updates from the company may have just given you the green light.
—Zev Fima, CNBC, 28 May 2026
Brett Knight, Forbes.com, 22 May 2026
Yates suffered a serious injury that sidelined him for five months, while Hunter had spent time playing tennis in Europe.
—Jason Beede, The Orlando Sentinel, 22 May 2026
See All Example Sentences for sideline
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Noun
Mitch McCarthy boomed a high kick 55 yards, sending Toney backpedaling 15 yards near the right sidelines inside the Miami 5 to field the punt.
—Bruce Feldman, New York Times, 28 May 2026
If concerns about the monetization of artificial intelligence investments and the wait for new revenue streams were keeping you on the sidelines, then two major updates from the company may have just given you the green light.
—Zev Fima, CNBC, 28 May 2026
Verb
Alcaraz, currently sidelined by a wrist injury, recently added partnerships with Evian, Infosys and YoPro yogurt and keeps his schedule packed with appearances and exhibitions that can pay him $2 million per event.
—Brett Knight, Forbes.com, 22 May 2026
Yates suffered a serious injury that sidelined him for five months, while Hunter had spent time playing tennis in Europe.
—Jason Beede, The Orlando Sentinel, 22 May 2026
See All Example Sentences for sideline
Cite this Entry
“Sideline.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sideline. Accessed 29 May. 2026.
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