The Collaborative International Dictionary of English v.0.48:

Speed \Speed\, v. t.
   1. To cause to be successful, or to prosper; hence, to aid;
      to favor. "Fortune speed us!" --Shak.
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            With rising gales that speed their happy flight.
                                                  --Dryden.
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   2. To cause to make haste; to dispatch with celerity; to
      drive at full speed; hence, to hasten; to hurry.
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            He sped him thence home to his habitation.
                                                  --Fairfax.
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   3. To hasten to a conclusion; to expedite.
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            Judicial acts . . . are sped in open court at the
            instance of one or both of the parties. --Ayliffe.
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   4. To hurry to destruction; to put an end to; to ruin; to
      undo. "Sped with spavins." --Shak.
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            A dire dilemma! either way I 'm sped.
            If foes, they write, if friends, they read, me dead.
                                                  --Pope.
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   5. To wish success or god fortune to, in any undertaking,
      especially in setting out upon a journey.
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            Welcome the coming, speed the parting guest. --Pope.
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   God speed you, them, etc., may God speed you; or, may you
      have good speed.
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   Syn: To dispatch; hasten; expedite; accelerate; hurry.
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