Arkwright, Sir Richard Syllabification: (Ark·wright, Sir Richard)Pronunciation: /ˈärkˌrīt/Definition of Arkwright, Sir Richard (1732–92), English inventor and industrialist. In 1767 he patented a water-powered spinning machine known as the spinning jenny. Arkwright, Sir Richard in other Oxford dictionaries Definition of Arkwright, Sir Richard in the British & World English dictionary