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.
Southern red wood ants are considered a keystone species, meaning they play an important role in supporting healthy ecosystems.
From BBC ● Jun. 28, 2026
She pointed to the 1967 Outer Space Treaty, a keystone document on international space law that President Lyndon Johnson signed onto.
From Salon ● Apr. 9, 2026
The home became a keystone of Gehry’s work, and a symbol of rebellion against architectural polish and formality.
From Los Angeles Times ● Dec. 5, 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
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
Vocabulary lists containing keystone
