: one of the three administrative jurisdictions into which Yorkshire, England, was formerly divided
2
: an administrative jurisdiction or electoral district in a British dominion (such as Canada)
Word History
Etymology
Noun (2)
Middle English -redying or trithing, alteration of Old English *thriding, from Old Norse thrithjungr third part, from thrithi third; akin to Old English thridda third — more at third entry 1