ceiling
noun
ˈsiːlɪŋ
noun
1
the
inner
surface
of
the
top
part
of
a
room
天花板;
rooms
with
high
ceilings
天花板很高的房间
a
light
hanging
from
the
ceiling
吊在天花板上的灯
2
the
largest
number
or
amount
of
something
that
is
officially
allowed
上限，最高限度
[+
of
]
a
public
spending
ceiling
of
£240
bn
上限为 2.4 千亿英镑的公共开支
impose/set/put
a
ceiling
(on
sth)
The
government
imposed
a
ceiling
on
imports
of
foreign
cars.
政府对进口外国汽车的数量规定了上限。
raise/lower
the
ceiling
(on
sth)
3
the
greatest
height
an
aircraft
can
fly
at
or
the
level
of
the
clouds
[术语] 最大飞行高度，升限; 云幕高度
technical