I. ˈ ̷ ̷ˌ ̷ ̷ ̷ ̷ noun
Etymology: Middle English sid saddil, from sid, side side + saddil, sadel saddle — more at side , saddle
: a saddle for women in which the rider sits with both legs on the same side of the horse
II. adverb
: on or as if on a sidesaddle
the girl rode sidesaddle