noun, preposition · the overhead interior surface that bounds the upper limit of a room

房间的天花板上挂着一盏华丽的水晶灯。

noun · slang for the absolute best or highest level achievable in a specific field

这部电影的特效简直是国产科幻片的天花板。

noun · a figurative maximum point or cap, such as a career glass ceiling

他在这个行业的职业发展似乎已经触碰到了天花板。