It means (Instead). "I told her to do it this way, where as she insisted on doing it her own way and got it all wrong" "I told her to do it this way, instead she insisted on doing it her own way and got it all wrong". "look at the trouble your in, where as had you listened to me you wouldn't be in this situtation" "Look at the trouble your in, instead had you listened to me you wouldn't be in this situation" "I thought her outfit would be hideous, where as truth be known she looked amazing" "I thought her outfit would be hideous, instead truth be known she looked amazing" hope this helps :)
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