not either; not one or the other
"I would like neither coffee nor tea, so just bring me some water instead."
Similarly not.
"The traffic was bad on both routes, so I decided neither of them would get me to work faster."
In plain English: Neither is used to say that two things are both not true or happening.
"Neither of us went to the party last night."
Usage: Use neither as an adverb to mean "not either" when joining two negative statements with a comma or semicolon. Place it immediately after the verb or auxiliary word in the second clause to emphasize that both options are excluded.
Not one of two; not either.
"I decided to go neither to the beach nor to the park today since it was raining."
Not either one of two.
"I don't like coffee, and neither do I prefer tea when it's raining outside."
Neither comes from the Old English phrase nāhwæþer, which literally meant "no" combined with "whether." The word entered Middle English as a contraction before evolving into its modern form through an alteration of either.