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

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

From The Wall Street Journal • Jun. 3, 2026

Meanwhile, the president is "the keystone of the institution", leading the armed forces and having the power to dissolve the Assembly, Diallo said.

From Barron's • Jun. 2, 2026

Despite the pile-up of particulars, Metcalfe knows he must find the lost poem, that it is the keystone without which the story crumbles into insignificance.

From Los Angeles Times • Sep. 19, 2025

There was a general shout of outrage, and then we recommended the building of Leper’s triumphal arch around Brinker’s keystone.

From "A Separate Peace" by John Knowles