a.

1. 两者都不
   Neither shoe fits comfortably.

   两只鞋都不合脚。

pron.

1. （两者之中）无一个
   Neither of my friends has come yet.

   我的两个朋友都还没来。

conj.

1. （与nor连用）既不……也不；也不
   We had neither money nor food.

   我们既没有钱，也没有食物。

   He neither drinks nor smokes.

   他既不喝酒也不抽烟。

   Neither the father nor the son is interested in the film.

   父子俩对这部电影都不感兴趣。

ad.

1. （与no, not, never等连用）也不
   --"John can't swim." --"Neither can I."

   —“约翰不会游泳。” —“我也不会。”

det.

pron.

adv.

1. used before the first of two (or occasionally more) alternatives (the others being introduced by ‘nor’) to indicate that they are each untrue or each do not happen.
2. used to introduce a further negative statement.