The following is the results of your search for solemn meeting.
Solemn Meeting: (Isaiah 1:13) the convocation on the eighth day of the Feast of Tabernacles
(Leviticus 23:36; Numbers 29:35) R.V., "solemn assembly;" marg., "closing festival".
It is the name given also to the convocation held on the seventh day of
the Passover
(Deuteronomy 16:8)