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.

Putin traditionally attends the final day of the event to deliver keystone speeches.

From The Wall Street Journal • Jun. 3, 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

They "play a central role in the food web, consuming fish and invertebrates and recycling nutrients" and are one of the "keystone species" of their ecosystem.

From Barron's • Oct. 10, 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