having complete or unlimited knowledge, awareness, or understanding; perceiving all things.
an omniscient being.
the Omniscient, God.
Origin of omniscient
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
having infinite knowledge or understanding
having very great or seemingly unlimited knowledge
Word Origin for omniscient
C17: from Medieval Latin omnisciens, from Latin omni- + scīre to know
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
c.1600, from Modern Latin omniscientem (nominative omnisciens), back-formation from Medieval Latin omniscientia (see omniscience). Related: Omnisciently.
Online Etymology Dictionary, © 2010 Douglas Harper