Basie, Count (William) 1904 - 1984. US jazz band leader and pianist. He developed the big-band sound and a simplified, swinging style of music. He led impressive groups of musicians in a career spanning more than 50 years. Basie's compositions include One O'Clock Jump and Jumpin' at the Woodside. His solo piano technique was influenced by the style of Fats Waller. Some consider his the definitive dance band.