The Collaborative International Dictionary of English v.0.48:

Discourse \Dis*course"\, v. i. [imp. & p. p. Discoursed; p.
   pr. & vb. n. Discoursing.]
   1. To exercise reason; to employ the mind in judging and
      inferring; to reason. [Obs.] "Have sense or can
      discourse." --Dryden.
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   2. To express one's self in oral discourse; to expose one's
      views; to talk in a continuous or formal manner; to hold
      forth; to speak; to converse.
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            Bid me discourse, I will enchant thine ear. --Shak.
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   3. To relate something; to tell. --Shak.
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   4. To treat of something in writing and formally.
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