a·gog (?-g?g?)adj. Full of keen anticipation or excitement; eager.[Middle English agogge, from Old French en gogue, in merriment : en, in (from Latin in; see in-2) + gogue, merriment.]a·gog? adv.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.agog (?????) adj (postpositive) highly impatient, eager, or curious[C15: perhaps from Old French en gogues in merriments, origin unknown]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014a?gog (??g?g) adj. highly excited by eagerness, curiosity, anticipation, etc. [1535?45; Middle French en gogues in mirth] -agog var. of -agogue. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.