Meaning of NEITHER in English

NEITHER

adj., pron., adv., & conj.

--adj. & pron. (foll. by sing. verb)

1. not the one nor the other (of two things); not either (neither of the accusations is true; neither of them knows; neither wish was granted; neither went to the fair).

2 disp. none of any number of specified things.

--adv.

1. not either; not on the one hand (foll. by nor; introducing the first of two or more things in the negative: neither knowing nor caring; would neither come in nor go out; neither the teachers nor the parents nor the children).

2 not either; also not (if you do not, neither shall I).

3 (with neg.) disp. either (I don't know that neither).

--conj. archaic nor yet; nor (I know not, neither can I guess).

Etymology: ME naither, neither f. OE nowther contr. of nohw{aelig}ther (as NO(2), WHETHER): assim. to EITHER

Oxford English vocab.      Оксфордский английский словарь.