wheth·er / ˈ(h)we[voicedth]ər/ • conj. expressing a doubt or choice between alternatives: he seemed undecided whether to go or stay it is still not clear whether or not he realizes. ∎ expressing an inquiry or investigation (often used in indirect questions): I'll see whether she's at home. ∎ indicating that a statement applies whichever of the alternatives mentioned is the case: I'm going whether you like it or not.PHRASES: whether or no1. whether or not: the only issue arising would be whether or no the publication was defamatory.2. archaic in any case: God help us, whether or no!