determiner
either
Each of two people or things.
Trees stand on either side of the narrow road.
Etymology
Old English ǣgþer could mean each of two. This inherited sense remains in expressions such as on either side, where both sides are included.
More examples
- She held a bag in either hand.
- There were lamps at either end.
- Either bank of the river had footpaths.
Forms
either
Similar words
- both
- Emphasizes the pair together rather than each side separately.