1.(in order, series)第二的
2.(alternate)交替的；隔一的
3.(in ranking)第二位的；第二级的；二等的
Cork, Ireland's second city科克, 爱尔兰第二大城市
How could they be content with second place?他们怎么能甘居第二？
4.the second …
(with superlatives)第二…的
the second largest city in the United States美国第二大城市
the second tallest building in the world世界上第二高的建筑物
the second most visited region in the country全国游客人数第二多的地区
5.(another)另一的；另加的；附加的
She's like a second mother to him.她就像他的第二个妈妈。
6.(inferior)次的；差的
a second order of importance次要
7.【汽车】(gear)二挡的
8.【音】(lower in pitch)第二声部的