whether
- Used to introduce the first of two or more alternatives, and sometimes repeated before the second or later alternative, usually with the correlative 'or'. conjunctionI don't know whether to go to the party or stay home.She couldn't decide whether she should take the job offer or continue her studies.
- Used to express a doubt or choice between alternatives. conjunctionHe asked whether it was possible to reschedule the meeting.I wonder whether they will arrive on time.