geology a fold in which one or both limbs have been inclined more than 90° from their original orientation
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 overfold
Historical Examples of overfold
A sigmoidal fold, showing a bed xx in an overfold with arch (a), trough (t) and common limb c.