one or the other of two: You may sit at either end of the table. each of two; the one and the other: There are trees on either side of the river. —pronoun
one or the other: There are two roads into the town, and you can take either. Either will do.
one or the other of two: You may sit at either end of the table.each of two; the one and the other: There are trees on either side of the river.—pronounone or the other: There are two roads into the town, and you can take either. Either will do.