grow·ing pains (gr???ng)pl.n.1. Pains in the limbs and joints of children or adolescents, often attributed to rapid growth but arising from various unrelated causes.2. Emotional difficulties that occur during adolescence.3. Problems that arise in the initiation or enlargement of an enterprise.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.growing pains pl n 1. (Pathology) pains in muscles or joints sometimes experienced by children during a period of unusually rapid growth 2. difficulties besetting a new enterprise in its early stages Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014grow?ing pains` n.pl. 1. dull, quasi-rheumatic pains of varying degree in the limbs during childhood and adolescence, often popularly associated with the process of growing. 2. emotional difficulties experienced during adolescence and preadulthood. 3. difficulties attending a new project or rapid development of an existing project. [1800?10] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.