Used when someone is sure about their opinion and conveys it assertively. During the debate, he began to pontificate on the subject as if his view was the final word.
Pro Tip 2/3
Negative Connotation
It can sound negative, suggesting arrogance or self-importance in the speaker. Stop pontificating and listen to what others have to say!
Pro Tip 3/3
Not for Casual Talk
Avoid using 'pontificate' in casual conversations; it can be perceived as overly formal or critical. I didn't expect you to pontificate over such a trivial matter.