The Collaborative International Dictionary of English v.0.48:

Young \Young\, n.
   The offspring of animals, either a single animal or offspring
   collectively.
   [1913 Webster]

         [The egg] bursting with kindly rupture, forth disclosed
         Their callow young.                      --Milton.
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   With young, with child; pregnant.
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The Collaborative International Dictionary of English v.0.48:

Young \Young\ (y[u^]ng), a. [Compar. Younger
   (y[u^][ng]"g[~e]r); superl. Youngest (-g[e^]st).] [OE.
   yung, yong, [yogh]ong, [yogh]ung, AS. geong; akin to OFries.
   iung, iong, D. joing, OS., OHG., & G. jung, Icel. ungr, Sw. &
   Dan. ung, Goth. juggs, Lith. jaunas, Russ. iunuii, L.
   juvencus, juvenis, Skr. juva[,c]a, juvan. [root]281. Cf.
   Junior, Juniper, Juvenile, Younker, Youth.]
   [1913 Webster]
   1. Not long born; still in the first part of life; not yet
      arrived at adolescence, maturity, or age; not old;
      juvenile; -- said of animals; as, a young child; a young
      man; a young fawn.
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            For he so young and tender was of age. --Chaucer.
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            "Whom the gods love, die young," has been too long
            carelessly said; . . . whom the gods love, live
            young forever.                        --Mrs. H. H.
                                                  Jackson.
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   2. Being in the first part, pr period, of growth; as, a young
      plant; a young tree.
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            While the fears of the people were young. --De Foe.
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   3. Having little experience; inexperienced; unpracticed;
      ignorant; weak.
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            Come, come, elder brother, you are too young in
            this.                                 --Shak.
      [1913 Webster]

WordNet (r) 3.0 (2006):

young
    adj 1: (used of living things especially persons) in an early
           period of life or development or growth; "young people"
           [syn: young, immature] [ant: old]
    2: (of crops) harvested at an early stage of development; before
       complete maturity; "new potatoes"; "young corn" [syn: new,
       young]
    3: suggestive of youth; vigorous and fresh; "he is young for his
       age" [syn: youthful, vernal, young]
    4: being in its early stage; "a young industry"; "the day is
       still young"
    5: not tried or tested by experience; "unseasoned artillery
       volunteers"; "still untested in battle"; "an illustrator
       untried in mural painting"; "a young hand at plowing" [syn:
       unseasoned, untested, untried, young]
    n 1: any immature animal [syn: young, offspring]
    2: United States film and television actress (1913-2000) [syn:
       Young, Loretta Young]
    3: United States civil rights leader (1921-1971) [syn: Young,
       Whitney Young, Whitney Moore Young Jr.]
    4: British physicist and Egyptologist; he revived the wave
       theory of light and proposed a three-component theory of
       color vision; he also played an important role in deciphering
       the hieroglyphics on the Rosetta Stone (1773-1829) [syn:
       Young, Thomas Young]
    5: United States jazz tenor saxophonist (1909-1959) [syn:
       Young, Pres Young, Lester Willis Young]
    6: English poet (1683-1765) [syn: Young, Edward Young]
    7: United States baseball player and famous pitcher (1867-1955)
       [syn: Young, Cy Young, Danton True Young]
    8: United States religious leader of the Mormon Church after the
       assassination of Joseph Smith; he led the Mormon exodus from
       Illinois to Salt Lake City, Utah (1801-1877) [syn: Young,
       Brigham Young]
    9: young people collectively; "rock music appeals to the young";
       "youth everywhere rises in revolt" [syn: young, youth]
       [ant: aged, elderly]