a turbulent stretch of water caused by marine currents over an underwater ridge
a mechanism that allows excess water to escape from a dam or lock
the point at which a sewer or land drainage discharges into the sea or a river

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Examples from the Web for overfall

Historical Examples of overfall

  • I think there is not in the world so strange an overfall, nor so wonderful to behold.

    The Discovery of Guiana

    Sir Walter Raleigh

  • It was most probable that an overfall existed somewhere, and doubtless through a cleft in the granite.