Of or pertaining to the manner of a master of an art, technique, profession, or craft; masterly. / In the manner of a master; very skillful.

Executed in the manner of a master; showing competence and skill; masterful. / (usually derogatory, obsolete) Like a master; arbitrary; domineering, imperious.

(archaic) In a masterful manner; competently, masterfully.

The conscious control of one's behaviour; self-command.

plural of mastaba

(idiomatic) A person who has a competent grasp of many skills but who is not outstanding in any one.

(education) A class, typically in a performing art such as music or drama, in which a teacher listens to and critiques the performance of individual students, one at a time, while the other students look on.

An action which demonstrates great skill or artistry.

A sexual activity in which two or more persons simultaneously masturbate themselves, usually while observing or otherwise communicating with one another.

(military, US) A non-commissioned officer in the United States Army, ranking above sergeant first class and below sergeant major; equal in grade and pay to a first sergeant.