0 used to describe a person whose hair is becoming grey or white, or the hair itself -- 變灰(白)色的(頭髮);頭髮變灰(白)色的(某人)
1 containing an increasing number of older people -- 老年人數增加的,老齡化的
Japan's greying population will drive up medical and pension payments. 日本人口老化將推高醫療和退休金開支。