3either conjunction
— used with or to indicate choices or possibilities ▪ You can either go or stay. ▪ I can't remember her name. It's either Marie or Mary. ▪ He will give the money either to his son or his daughter. = He will give the money to either his son or his daughter. ▪ A statement is either true or false. [=no statement is both true and false] ▪ They can either be black, brown, or blue. = They can be either black, brown, or blue. ◊When either and or are used to join two subjects in a sentence, the verb should agree with the subject that is closer to it.
▪ Either the professor or the students are wrong. ▪ Either you or I am wrong.
▪ Either the professor or the students are wrong. ▪ Either you or I am wrong.
