The Collaborative International Dictionary of English v.0.48:

Herd \Herd\, v. i. [imp. & p. p. Herded; p. pr. & vb. n.
   Herding.] [See 2d Herd.]
   1. To unite or associate in a herd; to feed or run together,
      or in company; as, sheep herd on many hills.
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   2. To associate; to ally one's self with, or place one's self
      among, a group or company.
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            I'll herd among his friends, and seem
            One of the number.                    --Addison.
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   3. To act as a herdsman or a shepherd. [Scot.]
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