master . mægester "one having control or authority," from L. magister "chief, head, director, teacher" (cf. maistre, Fr. maître, It. maestro, Ger. Meister), influenced in . by . maistre, from L. magister, contrastive adj. from magis (adv.) "more," itself a comp. of magnus "great." Meaning "original of a recording" is from 1904. In academic senses (from . magister) it is attested from late 14c., originally a degree conveying authority to teach in the universities. The verb is attested from early 13c. Related: Mastered.