Riding is a homonym of two distinct English words:
From the word ride:

• Equestrianism, riding a horse
• Riding animal, an animal bred or trained for riding
• Ridin', a song by Chamillionaire

From Old English *þriðing:

• Riding (country subdivision), an administrative division of a county, or similar district
• Electoral district (Canada), a Canadian term for an electoral district
• Riding association, Canadian political party organization at the riding level
• Riding officer, a name once used for customs officials who patrolled for smugglers on beaches and other informal landing spots
• Common Riding, an event celebrated in some Scottish towns to commemorate the guarding the boundaries of the town's common land by local men

Un riding, dérivé du vieux norrois thriding « tiers » (littéralement three-thing), désigne une ancienne division territoriale des Îles Britanniques, les plus connues étant les anciennes divisions territoriales du Yorkshire :

• North Riding
• West Riding
• East Riding