on the sidelines

Idioms  

1. Observing rather than taking part, out of the action, as in Bolivia's neighbors remained on the sidelines, waiting to see which faction in the dispute would prevail. This idiom comes from sports. The sidelines are the two lines defining the sides of the court or playing field and the area immediately beyond them where, in such sports as football, the non-playing team members sit. [First half of 1900s]

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Example Sentences

While for now he will sit on the sidelines, Damodaran said he would reconsider if the stock drops enough.

From MarketWatch • Jun. 5, 2026

The 2026 gubernatorial primary has been one of the most unpredictable and expensive in decades and a race that was shaped early on by a number of heavyweight Democrats staying on the sidelines.

From Los Angeles Times • Jun. 3, 2026

“We do not want to wait on the sidelines, but actively contribute to making synthetic fuels market-ready and scalable,” said Jens Fehlinger, the airline’s chief executive.

From The Wall Street Journal • Jun. 2, 2026

“Poor affordability is keeping buyers on the sidelines while higher rates make homeowners hesitant to sell outside of demographics and necessity,” TD Bank U.S.

From Barron's • May 26, 2026

She explained to him the reasons I couldn’t play and asked if there was some way I could be involved on the sidelines.

From "Ugly" by Robert Hoge