As leaders were called to participate in the School of the Prophets, The Lord instructed -
"Tarry ye, tarry ye in this place, and call a solemn assembly, even of those who are the first laborers in this last kingdom." (Doctrine and Covenants 88:70)
"Therefore, verily I say unto you, my friends, call your solemn assembly, as I have commanded you."
(Doctrine and Covenants 88:117)
The dictionary defines solemn as -
serious, sincere, sacred, and binding.
Which all religious leadership meetings should be.