• a man who has people working for him, especially servants or slaves

Synonyms: lord, overlord, lord and master, ruler, sovereign, monarch, liege, liege lord, suzerain

• a man in charge of an organization or group

Synonyms: lord, overlord, lord and master, ruler, sovereign, monarch, liege, liege lord, suzerain

• a skilled practitioner of a particular art or activity

Synonyms: expert, adept, genius, past master, maestro, virtuoso, professional, doyen, authority, pundit, master hand, prodigy, grandmaster, champion, star

• a person who holds a second or further degree

• used as a title prefixed to the name of a boy not old enough to be called ‘Mr’

• an original recording, film, or document from which copies can be made

Synonyms: original, archetype, prototype

• acquire complete knowledge or skill in (a subject, technique, or art)

Synonyms: learn, learn thoroughly, become proficient in, know inside out, know backwards, become expert in, acquire, pick up, grasp, understand

• gain control of; overcome

Synonyms: overcome, conquer, beat, quell, quash, suppress, control, repress, restrain, overpower, triumph over, subdue, vanquish, subjugate, hegemonize, prevail over, govern, curb, check, bridle, tame, defeat, get the better of, get a grip on, get over, gain mastery over

• make a master copy of (a film or recording)

• a ship or boat with a specified number of masts