from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Not one or the other; not either: Neither shoe feels comfortable.
- pro. Not either one; not the one or the other: Neither of the twins is here. Neither will do. Neither of them is incorrect.
- conj. Not either; not in either case. Used with the correlative conjunction nor: Neither we nor they want it. She neither called nor wrote. I got neither the gift nor the card.
- conj. Also not: If he won't go, neither will she.
- adv. Similarly not; also not: Just as you would not, so neither would they.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- not one of two; not either
- pro. not either one
- conj. not either (used with nor)
- adv. similarly not
from the GNU version of the Collaborative International Dictionary of English
- adj. Not either; not the one or the other.
- conj. Not either; generally used to introduce the first of two or more coördinate clauses of which those that follow begin with nor.
from The Century Dictionary and Cyclopedia
- Not either. See either.
- Not one or the other. See either, pron.
- Not either; not in either case: a disjunctive conjunction (the negative of either), preceding one of a series of two or more alternative clauses, and correlative with nor (or, formerly, neither or ne) before the following clause or clauses.
- Not in any case; in no case; not at all: used adverbially for emphasis at the end of the last clause, when this already contains a negative.
- And not; nor yet.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. not either; not one or the other
Middle English, from Old English nāwther, nāhwæther (influenced by æghwæther, ægther, either) : nā, not; see ne in Indo-European roots + hwæther, which of two; see kwo- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
Alteration (after either) of nauther, from Old English nawþer, contraction of nahwæþer, corresponding to no + whether. (Wiktionary)