(名詞) 人口大多是上了年紀者的郊區 (suburb)。亦寫成 elderburb

One idea, inspired by a NYT blog from yesterday on what uses could be found for abandoned or under-used exurban subdivisions: Convert them to elderburbs. Some of those McMansions are large enough to house several folks, including live-in caregivers.
—Zino, "Gadgets for Growing Old at Home" (comment), The New York Times, January 13, 2009

In "Elderburbia" — a term coined by cultural anthropologist Philip B. Stafford, and the title of his book on the challenges of aging in place — the way houses and neighborhoods were built in the 1950s, '60s and '70s isolates people as they age.
—"'Elderburbia': Suburban sprawl isolates our aging population," The Post-Standard, June 8, 2011