The Collaborative International Dictionary of English v.0.48:

Tread \Tread\, v. t.
   1. To step or walk on.
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            Forbid to tread the promised land he saw. --Prior.
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            Methought she trod the ground with greater grace.
                                                  --Dryden.
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   2. To beat or press with the feet; as, to tread a path; to
      tread land when too light; a well-trodden path.
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   3. To go through or accomplish by walking, dancing, or the
      like. " I am resolved to forsake Malta, tread a pilgrimage
      to fair Jerusalem." --Beau. & Fl.
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            They have measured many a mile,
            To tread a measure with you on this grass. --Shak.
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   4. To crush under the foot; to trample in contempt or hatred;
      to subdue.
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            Through thy name will we tread them under that rise
            up against us.                        --Ps. xliv. 5.
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   5. To copulate with; to feather; to cover; -- said of the
      male bird. --Chaucer.
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   To tread out, to press out with the feet; to press out, as
      wine or wheat; as, to tread out grain with cattle or
      horses.

   To tread the stage, to act as a stageplayer; to perform a
      part in a drama.
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