Source : Webster's Revised Unabridged Dictionary (1913)

Lush \Lush\, a. [Prob. an abbrev. of lushious, fr. luscious.]
   Full of juice or succulence. --Tennyson.

         How lush and lusty the grass looks! how green! --Shak.

Lush \Lush\, n. [Etymol uncertain; said to be fr. Lushington,
   name of a London brewer.]
   Liquor, esp. intoxicating liquor; drink. [Slang]

Source : WordNet®

lush
     adj 1: produced or growing in extreme abundance; "their riotous
            blooming" [syn: {exuberant}, {luxuriant}, {profuse}, {riotous}]
     2: characterized by extravagance and profusion; "a lavish
        buffet"; "a lucullan feast" [syn: {lavish}, {lucullan}, {plush},
         {plushy}]
     3: full of juice; "lush fruits"; "succulent roast beef";
        "succulent plants with thick fleshy leaves" [syn: {succulent}]
     n : a person who drinks alcohol to excess habitually [syn: {alcoholic},
          {alky}, {dipsomaniac}, {boozer}, {soaker}, {souse}]