riding
1. ri.ding \'ri-d-in\ n [ME, alter. of (assumed) OE thriding, fr. ON thrithjungr third part], fr. thrithi third; akin to OE thridda third - more at THIRD 1: one of the three administrative jurisdictions into which Yorkshire, Engl and, is divided 2: an administrative jurisdiction or electoral district in a British domini on (as Canada) 2. rid.ing \'ri-d-in\ n : the act or state of one that rides 3. rid.ing aj 1: used for or when riding {~ horse} 2: operated by a rider {~ plow}