Definitions

1. adverb

used to indicate that something is not one of two or more possibilities or alternatives

“I don’t know whether to go to the beach or the park, but I’m not going to either place, neither of which I like much.”

2. conjunction

used to indicate that something is not one of two or more alternatives

“Do you want to go to the movies or stay home? Neither, I’d rather do something else.”

3. pronoun

used to refer to one of two or more alternatives, especially when used in negative sentences

“Neither of the two options seems appealing to me.”