[UN-2 4.]
1. trans. To free from a bank or barrier. In quot. fig.
1842. Sir H. Taylor, Edwin the Fair, I. v. 36. Unbank the hours To that soft overflow which bids the heart Yield increase of delight.
2. To clear (a fire) from banked-up matter.
1890. Sci. Amer., 17 May, 315/3. The first duty of an engineer … is to ascertain how many gauges of water there are in his boilers. Never unbank or replenish the fires until this is done.
