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

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

Sunflower sea stars are considered a keystone species, meaning they are critical in regulating the stability and diversity of their ecosystems.

From Los Angeles Times • Aug. 4, 2025

Finally the keystone was lowered into place to lock the ribs together at the crown, the highest point of the arch.

From "Cathedral: The Story of Its Construction" by David Macaulay