either

Meaning of either in English

Adjective

1. one or the other of two things or people

You may take either book.

2. both; each

There are a lot of stores on either side of the road.

Adverb

1. also; too

He can't play the piano and I can't either.

2. used before one or the other given alternatives

You can either stay or go.

Pronoun

1. one of two

Choose either of the two books.

2. both of two

I don't know either of them. ー I know neither of them.