whether

  • conjunction 1 expressing a doubt or choice between alternatives. 2 expressing an enquiry or investigation. 3 indicating that a statement applies whichever of the alternatives mentioned is the case.

  — USAGE Whether and if are more or less interchangeable in sentences such as I’ll see whether he left an address and I’ll see if he left an address, although whether is more formal and more suitable for written use.

  — ORIGIN Old English.

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