v. 1 a intr. alight from a horse, bicycle, etc. b tr. (usu. in passive) throw from a horse, unseat. 2 tr. remove (a thing) from its mounting (esp. a gun from its carriage).
DISMOUNT
Meaning of DISMOUNT in English
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012