able to deal authoritatively with affairs; "dismissed the matter with an imperious wave of her hand"
having or revealing supreme mastery or skill; "a consummate artist"; "consummate skill"; "a masterful speaker"; "masterful technique"; "a masterly performance of the sonata"; "a virtuoso performance"
If you describe someone's behaviour or actions as masterful, you mean that they show great skill. a masterful performance of boxing and punching skills. = virtuoso
approval If you describe a man as masterful, you approve of him because he behaves in a way which shows that he is in control of a situation and can tell other people what to do. Big, successful moves need bold, masterful managers