Meaning of “either” - Learner’s Dictionary

either

adverb us uk /ˈaɪðər, ˈiːðər/

B1 used in negative sentences to mean that something else is also true:

The menu is boring and it's not cheap either.
I don't eat meat and Sam doesn't either.

More examples

  • "I can't go to the party." "No, I can't either."
  • He wasn't the only one, either.
  • "I've never been to Mexico." "No, I've never been there either."
  • Call John and tell him you can't come either.
  • "I don't like those cars." "No, I don't either."

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