first occurrence

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.

“If the radiologist had carefully reviewed both breast mammograms at the first occurrence, I would have skipped the lumpectomy and radiation and gone straight for bilateral mastectomies.”

From The Wall Street Journal • May 4, 2026

Federal biologists on Thursday confirmed the presence of a lethal fungus known as white-nose syndrome in Washington, the first occurrence in western North America of the disease that has killed roughly 7 million bats.

From Los Angeles Times • Oct. 31, 2024

Also alarming was the California Fivespined Ips beetle’s first occurrence in Western Washington.

From Seattle Times • May 19, 2024

Those studied were at increased risk for cardiovascular disease and were taking aspirin to prevent the first occurrence of a heart attack or stroke.

From Science Daily • Feb. 27, 2024

I do know, however, that from its first occurrence it has strengthened and developed until it has now become a dominating influence of a distinctly personal kind.

From The Garden of Survival by Blackwood, Algernon