Pontiff/ˈpɑːntɪf/ Definition 1 of 2Pro Tip 1/3Specific Role Used exclusively for the leader of the Catholic Church. The pontiff is visiting Brazil next month. Pro Tip 2/3Singular Figure There is only one pontiff at any given time in the Catholic Church. After the previous pontiff passed away, a new one was elected. Pro Tip 3/3Not a Common Term The word 'pontiff' is formal and mostly used in religious or official contexts. The pontiff's decree was heard worldwide.