Introducing a direct interrogative question (often with correlative or) which indicates doubt between alternatives.
Used to introduce an indirect interrogative question that consists of multiple alternative possibilities (usually with correlative or). Example: He chose the correct answer, but I don't know whether it was by luck or (whether it was) by skill.
Without a correlative, used to introduce a simple indirect question. Example: Do you know whether he's coming?
Used to introduce a disjunctive adverbial clause which qualifies the main clause of the sentence (with correlative or). Example: He's coming, whether you like it or not.
All clues having "WHETHER"
for an answer:
You can find a list of possible crossword clues for WHETHER below.