The Collaborative International Dictionary of English v.0.48:

Farm \Farm\, v. t. [imp. & p. p. Farmed; p. pr. & vb. n.
   Farming.]
   1. To lease or let for an equivalent, as land for a rent; to
      yield the use of to proceeds.
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            We are enforced to farm our royal realm. --Shak.
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   2. To give up to another, as an estate, a business, the
      revenue, etc., on condition of receiving in return a
      percentage of what it yields; as, to farm the taxes.
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            To farm their subjects and their duties toward
            these.                                --Burke.
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   3. To take at a certain rent or rate.
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   4. To devote (land) to agriculture; to cultivate, as land; to
      till, as a farm.
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   To farm let, To let to farm, to lease on rent.
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