a corporate directorate that includes one or more members who serve simultaneously in the directorates of other corporations.
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British Dictionary definitions for interlocking directorates
boards of directors of different companies having sufficient members in common to ensure that the companies involved are under the same control
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