The meaning of Pontificate-to

verb

To speak in an important manner as if only your opinion was correct

Usage examples:

Experts get on the tube and pontificate about the economy.

verb

To speak or write and give your opinion about something as if you knew everything about it and as if only your opinion was correct

Usage examples:

I think it should be illegal for non-parents to pontificate on/about parenting.

noun

The period of office of a pope (= leader of the roman catholic church)

Usage examples:

The decision was made during the pontificate of pope john xx.