1 a long piece of metal or plastic with a curved bottom that is fixed to the edge of a roof to carry away the water when it rains （排水）檐槽；天沟 ☞picture on page C7 见C7页插图

2 a lower part at the edge of a road along which the water flows away when it rains （路旁的）排水沟

3 the very lowest level of society 社会最底层: She rose from the gutter to become a great star. 她出身贫寒，后来成为大明星。