Meaning of “either” - Learner’s Dictionary

either

conjunction uk us /ˈaɪðər, ˈiːðər/
either... or

B1 used when you are giving a choice of two or more things:

Either call me tonight or I'll speak to you tomorrow.
There's either mashed, boiled, or baked potatoes.

(Definition of “either conjunction” from the Cambridge Learner’s Dictionary © Cambridge University Press)