Definition of Roman chair in US English:

Roman chair

noun

  • 1The papal throne; (hence) the office or position of Pope, the Papacy (now rare).

  • 2Bodybuilding a piece of equipment used primarily to perform exercises for the lower back, consisting of a short bench with an apparatus for holding the legs in a fixed position.

Origin

Early 17th century; earliest use found in Thomas Fitzherbert (1552–1640), Jesuit.