dow·a·ger’s hump (dou??-j?rz)n. An abnormal curvature of the spine that is primarily manifested as a rounded hump in the upper back and that typically affects older women. The curvature is the result of collapse of the spinal column caused by osteoporosis.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.dow?ager’s hump? n. Informal. a type of kyphosis, common in older women, in which the shoulders become rounded and the upper back develops a hump. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.