The Collaborative International Dictionary of English v.0.48:

Beget \Be*get"\, v. t. [imp. Begot, (Archaic) Begat; p. p.
   Begot, Begotten; p. pr. & vb. n. Begetting.] [OE.
   bigiten, bigeten, to get, beget, AS. begitan to get; pref.
   be- + gitan. See Get, v. t. ]
   1. To procreate, as a father or sire; to generate; --
      commonly said of the father.
      [1913 Webster]

            Yet they a beauteous offspring shall beget.
                                                  --Milton.
      [1913 Webster]

   2. To get (with child.) [Obs.] --Shak.
      [1913 Webster]

   3. To produce as an effect; to cause to exist.
      [1913 Webster]

            Love is begot by fancy.               --Granville.
      [1913 Webster]

WordNet (r) 3.0 (2006):

beget
    v 1: make children; "Abraham begot Isaac"; "Men often father
         children but don't recognize them" [syn: beget, get,
         engender, father, mother, sire, generate, bring
         forth]