adj.
Pronunciation: ' ē - th ə r also ' ī -
Function: adjective
Etymology: Middle English, from Old English ǣ ghwæther both, each, from ā always + ge-, collective prefix + hwæther which of two, whether ― more at AYE , CO-
Date: before 12th century
1 : being the one and the other of two : EACH <flowers blooming on either side of the walk> <plays either instrument well>
2 : being the one or the other of two <take either road>