- (conjunctive, after a negative) As well.
"I don't like him and I don't like her either."
- Introduces the first of two options, the second of which is introduced by "or".
"Either you eat your dinner or you go to your room."
- Each of two. [from 9th c.]
- (coordinating) Used before two or more not necessarily exclusive possibilities separated by "or" or sometimes by a comma.
"You'll either be early, late, or on time."
- One or the other of two. [from 14th c.]
- One or other of two people or things.
- (obsolete) Both, each of two or more.