nei·ther / ˈnē[voicedth]ər; ˈnī-/ • adj. & pron. not the one nor the other of two people or things; not either: [as adj.] neither side of the brain is dominant over the other | [as pron.] neither of us believes it. • adv. 1. used before the first of two (or occasionally more) alternatives that are being specified (the others being introduced by “nor”) to indicate that they are each untrue or each do not happen: I am neither a liberal nor a conservative.2. used to introduce a further negative statement: he didn't remember, and neither did I.PHRASES: neither here nor there see here.