Definitions

1. verb

to make or declare something solemn or formal; to give something a formal or impressive quality

“The coronation ceremony was solemnified by the presence of the royal family.”

2. verb

to render or make something impressive or dignified, especially in a formal or official context

“The president solemnified the occasion with a speech and a ceremony.”

3. transitive verb

to give a solemn or formal character to (something)

“The judge solemnified the trial with his authoritative presence.”