Mas"ter*ly, 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.

2. Imperious; domineering; arbitrary.

Mas"ter*ly, adv. With the skill of a master.

Thou dost speak masterly.