GNU Collaborative International Dictionary of English

Found 2 definitions

1.       
   Don , n. [Sp. don; akin to Pg. dom, It. donno; fr. L. dominus master. See Dame, and cf. Domine, Dominie, Domino, Dan, Dom.]
   Sir; Mr; Signior; -- a title in Spain, formerly given to noblemen and gentlemen only, but now common to all classes.
   1913 Webster
   Don is used in Italy, though not so much as in Spain. France talks of Dom Calmet, England of Dan Lydgate.
   Oliphant.
   
   1913 Webster
   A grand personage, or one making pretension to consequence; especially, the head of a college, or one of the fellows at the English universities. [Univ. Cant] “The great dons of wit.” 
   Dryden.
   
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2.       
   Don, v. t. [imp. & p. p. Donned ; p. pr. & vb. n. Donning.] [Do + on; -- opposed to doff. See Do, v. t., 7.] To put on; to dress in; to invest one's self with.
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   Should I don this robe and trouble you.
   Shak.
   
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   At night, or in the rain,
   He dons a surcoat which he doffs at morn.
   Emerson.
   
   1913 Webster