a·ki·ne·sia (??k?-n??zh?, -k?-)n. Loss of normal motor function, resulting in impaired muscle movement.[Greek akin?si? : a-, without; see a-1 + k?n?sis, motion; see -kinesis.]a?ki·net?ic (-n?t??k) adj.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.akinesia (?e?k??ni?z??) or akinesisnthe loss of the ability to move, caused by diseases of the central nervous systemCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014