a. & pron. | 1. | One of two; the one or the other; - properly used of two things, but sometimes of a larger number, for any one. |
2. | Each of two; the one and the other; both; - formerly, also, each of any number. | |
conj. | 1. | Either precedes two, or more, coördinate words or phrases, and is introductory to an alternative. It is correlative to or. |
Adv. | 1. | either - after a negative statement used as an intensive meaning something like `likewise' or `also'; "he isn't stupid, but he isn't exactly a genius either"; "I don't know either"; "if you don't order dessert I won't either" |