老龄化社会的英文：
aging society

参考例句：

Japan is an aging society with a shrinking workforce, which is supporting more and more retired people.
日本已步入老龄化社会，越来越多的退休老人需要赡养，而劳动力在不断减少。

aging是什么意思：
n. 老化，老龄化，熟化
v. 使变老

This is a bulletin on aging.
这是关于老龄问题的期刊。

They are close in age.
他们年龄相仿。

It will be a production that will be handed on from age to age.
这将是传世之作。

Attach importance to the problem of population aging (an aging population )
重视老龄化问题

One has reached the age of no doubting—forty years of age
年登不惑

society是什么意思：
n. 社会；社团；社交界；交往；

Humanity graded from primitive society to feudal society
人类由原始社会逐渐过渡到封建社会。

That's an open society.
那是一个开放的社会。

He was ostracized by the society.
他被社会所摒弃。

World Aquaculture Society
世界水产养殖业学会

freeze a society's funds
冻结一团体的基金