[rid.ing] n (14c): the action or state of one that rides
[2]rid.ing adj (15c) 1: used for or when riding "a ~ horse" "~ boots"
2: operated by a rider "a ~ mower" [3]ri.ding n [ME -redying or trithing, alter. of (assumed) OE thriding, fr. ON thrithjungr third part, fr. thrithi third; akin to OE thridda third--more at third] (15c) 1: one of the three administrative jurisdictions into which Yorkshire, England, was formerly divided
2: an administrative jurisdiction or electoral district in a British dominion (as Canada)