From The Collaborative International Dictionary of English v.0.48:
Lush \Lush\ (l[u^]sh), a. [Prob. an abbrev. of lushious, fr.
luscious.]
1. Full of juice or succulence. --Tennyson.
[1913 Webster]
How lush and lusty the grass looks! how green!
--Shak.
[1913 Webster]
2. Having thick and luxurient vegetation.
[PJC]
3. Characterized by abundance or luxurience; rich.
[PJC]
From The Collaborative International Dictionary of English v.0.48:
Lush \Lush\, n. [Etymol uncertain; said to be fr. Lushington,
name of a London brewer.]
1. Liquor, esp. intoxicating liquor; drink. [Slang] --C.
Lever.
[Webster 1913 Suppl.]
2. an habitual drunkard.
[PJC]