overfall

(redirected from overfalls)
Also found in: Encyclopedia.

overfall

(ˈəʊvəˌfɔːl)
n
1. (Physical Geography) a turbulent stretch of water caused by marine currents over an underwater ridge
2. (Civil Engineering) a mechanism that allows excess water to escape from a dam or lock
3. (Physical Geography) the point at which a sewer or land drainage discharges into the sea or a river
References in periodicals archive ?
Metaphorically reflecting in "Watch" on his three decades of marriage, he considers "Chartered years of bell-shaped lead-lines, / Riptides, overfalls, height and shallow, / So much unfathomed.
In the vicinity of Singapore the tidal streams can attain rates of some 6 knots with associated eddies and overfalls.
In an 18ft Drascombe lugger, the overfalls off the Great Orme and the Gower seemed a bit larger in proportion and our landfall at Rhyl harbour in the dark, I shall never forget