(sēä´kä prō´bĬn) , 1905-88, president of Sierra Leone (1971-85). He served (1951-57) in the legislative council and was appointed (1967) prime minister. Briefly exiled, he returned as prime minister (1968-71). In 1971 he became president under a new constitution that established a republic. Stevens established a one-party state in 1978. In 1985 he retired and was succeeded by Major Gen. Joseph Momoh.
