Wordnet 3.0
NOUN (1)
1. 
 a native or inhabitant of Jamaica; 
ADJECTIVE (1)
1. 
 of or relating to Jamaica (the island or the country) or to its inhabitants; 
- Example: "Jamaican rum"- Example: "the Jamaican Prime Minister"
The Collaborative International Dictionary of English v.0.48:
Jamaican \Ja*mai"can\, a.
   Of or pertaining to Jamaica. -- n. A native or inhabitant of
   Jamaica.
   [1913 Webster]
WordNet (r) 3.0 (2006):
Jamaican
    adj 1: of or relating to Jamaica (the island or the country) or
           to its inhabitants; "Jamaican rum"; "the Jamaican Prime
           Minister"
    n 1: a native or inhabitant of Jamaica