dis·or·der (d?s-ôr?d?r)n.1. A lack of order or regular arrangement; confusion.2. A breach of civic order or peace; a public disturbance.3. A condition characterized by lack of normal functioning of physical or mental processes: kidney disorders; a psychiatric disorder.tr.v. dis·or·dered, dis·or·der·ing, dis·or·ders 1. To throw into confusion or disarray.2. To disturb the normal physical or mental health of; derange.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.disorder (d?s???d?) n1. a lack of order; disarray; confusion2. (Law) a disturbance of public order or peace3. (Medicine) an upset of health; ailment4. a deviation from the normal system or ordervb (tr) 5. to upset the order of; disarrange; muddle6. (Medicine) to disturb the health or mind ofCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014dis?or?der (d?s??r d?r) n. 1. lack of order or regular arrangement; confusion. 2. breach of order; public disturbance. 3. a disturbance in physical or mental health v.t. 4. to disarrange. 5. to derange the physical or mental health or functions of. [1470?80] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.