Usage patterns
〈場所〉の天井が高いthe ceiling of a place is high
The ceiling of this hall is very high.
天井から〈物〉がぶら下がるsomething hangs from the ceiling
A light is hanging from the ceiling.
〈物〉が天井を打つa price hits its upper limit
The stock price hit its ceiling.
〈数〉に天井を設けるto set an upper limit on an amount
We decided to set a ceiling on spending.