The Collaborative International Dictionary of English v.0.48:

Feat \Feat\ (f[=e]t), n. [OE. fet, OF. fet, fait, F. fait,
   factum, fr. L. facere, factum, to make or do. Cf. Fact,
   Feasible, Do.]
   1. An act; a deed; an exploit.
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            The warlike feats I have done.        --Shak.
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   2. A striking act of strength, skill, or cunning; a trick;
      as, feats of horsemanship, or of dexterity.
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The Collaborative International Dictionary of English v.0.48:

Feat \Feat\, v. t.
   To form; to fashion. [Obs.]
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         To the more mature,
         A glass that feated them.                --Shak.
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The Collaborative International Dictionary of English v.0.48:

Feat \Feat\, a. [Compar. Feater; superl. Featest.] [F. fait
   made, shaped, fit, p. p. of faire to make or do. See Feat,
   n.]
   Dexterous in movements or service; skillful; neat; nice;
   pretty. [Archaic]
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         Never master had a page . . . so feat.   --Shak.
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         And look how well my garments sit upon me
         Much feater than before.                 --Shak.
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WordNet (r) 3.0 (2006):

feat
    n 1: a notable achievement; "he performed a great feat"; "the
         book was her finest effort" [syn: feat, effort,
         exploit]