a. Full to the bank or brink.

1

c. 1581.  J. Falkner, in Eng. Mech., 4 Feb. (1870), 500/2. The same water in the morning before was bankefull.

2

1637.  Rutherford, Lett., 169 (1862), I. 397. A little of God would make my soul bankfull.

3

1865.  Visct. Milton & W. B. Cheadle, Northwest Passage by Land, 275. This river was some sixty yards in width, and bank-full with glacier-water.

4