greying
noun
ˈɡreɪ-ɪŋ
noun
1
the greying of sth
the
situation
in
which
the
average
age
of
a
population
increases,
so
that
there
are
more
old
people
than
there
were
in
the
past
某事物的老龄化
the
greying
of
classical
music
audiences
古典音乐听众的老龄化