The counselor had a prior engagement.
Prior to the late nineties, Clinton was president.
I detest going to their grimy house. Prior to their marriage they were both good house keepers.
Example sentence - She looked over her shoulder prior to backing the car out of the driveway.
All in all, visits to the deserts can be easily enjoyed, with the proper prior preparations.
Both words can be correctly utilized in a properly arranged sentence. Prior to the previous message, I had a simpler plan. The previous Prior was taller.
Prior to reading this question I would have thought it was too early to answer it.
prior to
I would like to come. but a prior engagement prevents me from accepting
Prior to the Industrial Revolution, clothing was made by hand.
She had no prior knowledge of the event. Prior to the new legislation, motorcycle riders were not required to wear helmets.
When I want to work effectively I need to have had a good night's sleep prior to starting the job.
"Prior" can function as either an adjective or an adverb, depending on how it is used in a sentence.