Riley, Bridget Syllabification: (Ri·ley, Bridget)Pronunciation: /ˈrīlē/Definition of Riley, Bridget (1931-), English painter; full name Bridget Louise Riley. A leading exponent of op art, she worked with flat patterns to create optical illusions of light and movement. Riley, Bridget in other Oxford dictionaries Definition of Riley, Bridget in the British & World English dictionary