adv., prop. phrase. [A prep.1 of state + BURST sb. The modern use of the word is not descended from the old, but analogous to ABLOOM, etc.]
† 1. In a burst (of rage, etc.).
1205. Layamon, II. 639. Cnihtes an burste weoren. 1250 Cnihtes a borst weren.
2. In a bursting condition; bursting.
1876. Mrs. Whitney, Sights & Ins., II. xxxvi. 650. Country like this,all alive, and aburst, and teeming.