whether

Universal Words conjunction 1 used to express a doubt or choice between two possibilities: He seemed undecided whether to go or stay. * It remains to be seen whether or not this idea can be put into practice. * I asked him whether he had done it all himself or whether someone had helped him. * I'll see whether she's at home (= or not at home). * It's doubtful whether there'll be any seats left. -< IF 2 used to show that sth is true in either of two cases: You are entitled to a free gift whether you accept our offer of insurance or not. * I'm going whether you like it or not. * Whether or not we're successful, we can be sure that we did our best.