1.adv
替代；更换
If you cannot go,he'll go instead of you.
如果你不能去,他愿替你去.
If there is no coal,oil can be used instead.
如果没有煤,可以用石油来代替.
2.（与of连用）代替; 而不是; 不...而...
We'll have tea in the garden instead of in the house.
我们将改在花园喝茶,而不在屋里喝.
I will go instead of you.
我代你去.