1 a part or share of sth （某物的）一部份，一份: What portion of your salary goes on tax? 你薪金中有多少用来付税款呢？We must both accept a portion of the blame. 我们两人都必须负部份责任。

2 an amount of food for one person (especially in a restaurant) （食物的）一份，一客（尤指在餐馆里）: Could we have two extra portions of chips, please? 麻烦你，我们想多要两份炸马铃薯条。 ☞Look at helping. 参看helping。