a. 1. Suitable to, or characteristic of, a master; indicating thorough knowledge or superior skill and power; showing a master's hand; as, a masterly design; a masterly performance; a masterly policy. “A wise and masterly inactivity.” Sir J. Mackintosh. [ 1913 Webster ]
(adj) having or revealing supreme mastery or skill, Syn. masterful, virtuoso, masterly, Example:a consummate artist; consummate skill; a masterful speaker; masterful technique; a masterly performance of the sonata; a virtuoso performance