The Collaborative International Dictionary of English v.0.48:

Prod \Prod\, n. [Cf. Gael. & Ir. brod goad, prickle, sting, and
   E. brad, also W. procio to poke, thrust.]
   [1913 Webster]
   1. A pointed instrument for pricking or puncturing, as a
      goad, an awl, a skewer, etc.
      [1913 Webster]

   2. A prick or stab which a pointed instrument.
      [1913 Webster]

   3. A light kind of crossbow; -- in the sense, often spelled
      prodd. --Fairholt.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Prod \Prod\, v. t. [imp. & p. p. Prodded; p. pr. & vb. n.
   Prodding.]
   To thrust some pointed instrument into; to prick with
   something sharp; as, to prod a soldier with a bayonet; to
   prod oxen; hence, to goad, to incite, to worry; as, to prod a
   student. --H. Taylor.
   [1913 Webster]

WordNet (r) 3.0 (2006):

prod
    n 1: a verbalization that encourages you to attempt something;
         "the ceaseless prodding got on his nerves" [syn: goad,
         goading, prod, prodding, urging, spur,
         spurring]
    2: a pointed instrument that is used to prod into a state of
       motion [syn: prod, goad]
    v 1: to push against gently; "She nudged my elbow when she saw
         her friend enter the restaurant" [syn: nudge, poke at,
         prod]
    2: urge on; cause to act; "The other children egged the boy on,
       but he did not want to throw the stone through the window"
       [syn: prod, incite, egg on]
    3: poke or thrust abruptly; "he jabbed his finger into her ribs"
       [syn: jab, prod, stab, poke, dig]