Whether or Either what is the difference of these two. Regarding to their meaning they seems same. Here is the meaning and example for each case: Whether (conjunction) 1. expressing a doubt or choice between alternatives. "he seemed undecided whether to go or stay" 2. expressing an enquiry or investigation (often used in indirect questions). "I'll see whether she's at home" 3. indicating that a statement applies whichever of the alternatives mentioned is the case. "I'm going whether you like it or not" Either(conjunction) Either ….or 1. Used to begin a list of two or more possibilities You add either one or two cloves of garlic. 2. Used to say that one thing does not happen then something else will have to. It's your choice! Either she leaves or I will.