[reez joo-di-key-tuh, reys]
a thing adjudicated; a case that has been decided.
Origin of res judicata
Borrowed into English from Latin around 1685–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
law a matter already adjudicated upon that cannot be raised again
Word Origin for res judicata
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
Latin, "a point decided by competent authority."
Online Etymology Dictionary, © 2010 Douglas Harper