Wordnet 3.0
NOUN (2)
1. 
 an island of central Hawaii; 
 a pineapple-growing area; 
[syn: Lanai, Lanai Island]
2.  a veranda or roofed patio often furnished and used as a living room; 
The Collaborative International Dictionary of English v.0.48:
Lanai \Lanai\ n.
   1. (upper case) an island in the Hawaiian chain.
      [WordNet 1.5]
   2. (lower case) a veranda or roofed patio often furnished and
      used as a living room. [Hawaii]
      [WordNet 1.5]
WordNet (r) 3.0 (2006):
Lanai
    n 1: an island of central Hawaii; a pineapple-growing area [syn:
         Lanai, Lanai Island]
    2: a veranda or roofed patio often furnished and used as a
       living room