an abbreviated form of the male Christian name Donald.
in English universities, a head, fellow or tutor of a college.
in Spanish and Italian, Don is a title of respect prefixed to a man's Christian name, e.g. Don Juan, Don Quijote, or in the operas Don Carlos, Don Giovanni, Don Pasquale, etc. Hence, it is also a (rather old-fashioned) slang name for a Spaniard. The word appears in Henry Newbolt's poem Drake's Drum: "If the dons sight Devon, I'll quit the port of heaven...". It is abbreviated as D. Don is also commonly used as a general term for mafia bosses.
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