[ swey-bak ]

  1. an excessive downward curvature of the spinal column in the dorsal region, especially of horses.


Origin of swayback

An Americanism dating back to 1865–70; sway + back1

Words Nearby swayback

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use swayback in a sentence

British Dictionary definitions for sway-back


  1. vet science an abnormal sagging or concavity of the spine in older horses

  2. a paralytic disease of new-born and young lambs caused by demyelination of the central nervous system due to copper deficiency

Derived forms of sway-back

  • sway-backed, adjective

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012