'Unhorse' definitions:

Definition of 'unhorse'

(from WordNet)
verb
Alight from (a horse) [syn: unhorse, dismount, light, get off, get down]

Definition of 'Unhorse'

From: GCIDE
  • Unhorse \Un*horse"\, v. t. [1st pref. un- + horse.] To throw from a horse; to cause to dismount; also, to take a horse or horses from; as, to unhorse a rider; to unhorse a carriage. --Cowper. [1913 Webster]

Synonyms of 'unhorse'

From: Moby Thesaurus