Meaning of correlative conjunction

correl'ative conjunc'tion

Pronunciation: [key]
— Gram. Gram.
  1. either member of a matched pair of words, of which the second is a coordinating conjunction, as either … or, neither … nor, both … and, or not only … but.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.