noun. a man skilled in equitation.
adverb. ['ˈhɔrsˌbæk'] on the back of a horse.
noun. ['ˈraɪdɝ'] a clause that is appended to a legislative bill.
noun. ['ˈraɪdɝ'] a traveler riding in a vehicle (a boat or bus or car or plane or train etc) who is not operating it.