rounded roof with a circular base 穹顶; 圆屋顶: the dome of St Paul's cathedral 圣保罗大教堂的穹顶. 
thing shaped like this 圆顶形物; 穹形物: the dome of a hill, the night sky, a bald head 山包﹑ 黑夜的天穹﹑ 光秃的头顶.> domed adj [usu attrib 通常作定语] having or shaped like a dome 有穹顶的; 圆顶形的: a domed forehead 隆起的前额.