The Collaborative International Dictionary of English v.0.48:

Offspring \Off"spring`\, n. sing. & pl. [Off + spring.]
   [1913 Webster]
   1. The act of production; generation. [Obs.]
      [1913 Webster]

   2. That which is produced; a child or children; a descendant
      or descendants, however remote from the stock.
      [1913 Webster]

            To the gods alone
            Our future offspring and our wives are known.
                                                  --Dryden.
      [1913 Webster]

   3. Origin; lineage; family. [Obs.] --Fairfax.
      [1913 Webster]

WordNet (r) 3.0 (2006):

offspring
    n 1: the immediate descendants of a person; "she was the mother
         of many offspring"; "he died without issue" [syn:
         offspring, progeny, issue]
    2: something that comes into existence as a result;
       "industrialism prepared the way for acceptance of the French
       Revolution's various socialistic offspring"; "this skyscraper
       is the solid materialization of his efforts" [syn:
       offspring, materialization, materialisation]
    3: any immature animal [syn: young, offspring]