'Withers' definitions:

Definition of 'withers'

From: WordNet
noun
The highest part of the back at the base of the neck of various animals especially draft animals

Definition of 'Withers'

From: GCIDE
  • Withers \With"ers\, n. pl. [Properly, the parts which resist the pull or strain in drawing a load; fr. OE. wither resistance, AS. wi[eth]re, fr. wi[eth]er against; akin to G. widerrist withers. See With, prep.] The ridge between the shoulder bones of a horse, at the base of the neck. See Illust. of Horse. [1913 Webster]
  • Let the galled jade wince; our withers are unwrung. --Shak. [1913 Webster]