The word "neither" is similar to the word "none"; however, you usually use "neither" when there are two things, two groups, two people, a person and a group, etcetera. There are two acceptable pronunciations for this word:
neither (long e)
neither (long i)
In these sentences, neither is an adjective (Notice that "neither" is placed before a noun in these examples):
Neither applicant is qualified for the position. (Two people applied. None of them is qualified.)
Neither store had what I was looking for.
She likes neither one. (She doesn't like any of the choices.)
Bob likes neither one of these girls.
In these sentences, "neither" is a pronoun:
Maria likes neither of the apartments that she looked at today. (This could be from among two choices or a group larger than two.)
When asked about her choices, she said that neither was acceptable. (The word "neither" is singular when used as a pronoun.)
Neither of the choices is acceptable. (Not, "Neither of the choices are acceptable.)
She doesn't like this one or that one. She likes neither.
The word "neither" is also used as a conjunction with another conjunction, "nor."
The workers are neither well-paid nor secure in their positions.
An SUV is neither a car nor a truck. It's somewhere in between. (It is not a car or a truck.)
Neither a lender nor a borrower be. (This is a popular quote from Hamlet. Polonius is giving advice to his son, Laertes.)