keystone

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Morgan healthcare investor conference in San Francisco in mid-January, a keystone event at which companies often pre-announce guidance and earnings and roll out marquee acquisitions.

From Barron's • Dec. 28, 2025

Last year, some 1,000 U.S. troops withdrew from neighboring Niger, ending a nearly decadelong partnership that was the keystone of U.S. counterterrorism operations in the region.

From The Wall Street Journal • Nov. 2, 2025

"You targeted the police as a keystone of government power," he added.

From BBC • Jun. 13, 2025

“While there’s no silver bullet solutions to environmental restoration, beavers are a keystone species, and an important part of the puzzle to restore our ecosystems in California.”

From Los Angeles Times • Jan. 7, 2025

For the same color is plain around the keystone of each arch of the Old Bridge, which soars beautifully over the river upstream from the arch.

From "The Left Hand of Darkness" by Ursula K. Le Guin