drilling rig n 1. (Mining & Quarrying) the full name for rig16 2. (Mining & Quarrying) a mobile drilling platform used for exploratory offshore drilling Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014