whether

(conjunction, pronoun)

conjunction

1. (obsolete) Introducing a direct interrogative question (often with correlative or) which indicates doubt between alternatives.

2. Used to introduce an indirect interrogative question that consists of multiple alternative possibilities (usually with correlative or).

- He chose the correct answer, but whether by luck or by skill I don't know.

3. Without a correlative, used to introduce a simple indirect question; if, whether or not.

- Do you know whether he's coming?

4. Used to introduce a disjunctive adverbial clause which qualifies the main clause of the sentence (with correlative or).

- He's coming, whether you like it or not.

pronoun

1. (obsolete) Which of two. [11th-19th c.]