silver alert

(名詞) 銀髮族 (尤指罹患癡呆症或阿茲海默症等認知功能障礙的老年人) 走失的大眾通報系統。

Mr. Casey, who sits on the Senate Special Committee on Aging, said the issue of seniors suffering from dementia who wander off is a growing problem as Americans age and more seniors are cared for at home. He held a news conference Friday at United Neighborhood Centers of Northeastern Pennsylvania's West Scranton Senior Center to discuss creating a "Silver Alert," which would inform law enforcement and the public when a senior goes missing.
—David Falchek, "Casey: 'Silver Alert' needed to protect seniors with dementia," The Scranton Times-Tribune, February 1, 2014

As six out of 10 people with dementia are apt to wander, the county is expanding its Alert San Diego system to notify residents of specific areas when someone is missing. The so-called "Silver Alerts" will make reverse 9-1-1 calls to the estimated 375,000 people registered with the system.
—Michele Parente, "Alzheimer's Project takes shape," The San Diego Union-Tribune, July 6, 2015