'Solemn' in the Bible

The ways of Zion do mourn, because none come to the solemn assembly; all her gates are desolate, her priests do sigh: her virgins are afflicted, and she herself is in bitterness.

The Lord has set at nothing all my mighty men in the midst of me; He has called a solemn assembly against me to crush my young men: The Lord has trodden as in a winepress the virgin daughter of Judah.

He has violently taken away his tabernacle, as if it were of a garden; he has destroyed his place of assembly: Yahweh has caused solemn assembly and Sabbath to be forgotten in Zion, Has despised in the indignation of his anger the king and the priest.

The Lord has cast off his altar, he has abhorred his sanctuary; He has given up into the hand of the enemy the walls of her palaces: They have made a noise in the house of Yahweh, as in the day of a solemn assembly.

You have called, as in the day of a solemn assembly, my terrors on every side; There was none that escaped or remained in the day of Yahweh's anger: Those that I have dandled and brought up has my enemy consumed.