Mes·ter n. [Obs.] See Mister, a trade.
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Mis·ter, n. [Written also mester.]
1. A trade, art, or occupation. [Obs.]
In youth he learned had a good mester. --Chaucer.
2. Manner; kind; sort. [Obs.]
But telleth me what mester men ye be. --Chaucer.
3. Need; necessity. [Obs.]