[UP- 2. Cf. next.]
1. An eruption or outburst.
1856. Mrs. Browning, Aur. Leigh, VII. 54. Through all The upbreak of the fountains of my heart.
1871. E. F. Burr, Ad Fidem, xiv. 277. A furious upbreak of unbelief.
2. A breaking-up or dissolution.
1882. Macm. Mag., XLV. 496. The upbreak of the Catholico-Feudal System.