From The Collaborative International Dictionary of English v.0.48:
Don \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. [1913 Webster]
Should I don this robe and trouble you. --Shak. [1913 Webster]
At night, or in the rain, He dons a surcoat which he doffs at morn. --Emerson. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Don \Don\ (d[o^]n), n. [Sp. don; akin to Pg. dom, It. donno; fr. L. dominus master. See Dame, and cf. Domine, Dominie, Domino, Dan, Dom.] 1. 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]
2. 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. [1913 Webster]