Wordnet 3.0
NOUN (2)
1. 
 a native or inhabitant of Bulgaria; 
2. 
 a Slavic language spoken in Bulgaria; 
ADJECTIVE (1)
1. 
 of or relating to or characteristic of Bulgaria or its people; 
- Example: "the Bulgarian capital is Sofia"
WordNet (r) 3.0 (2006):
Bulgarian
    adj 1: of or relating to or characteristic of Bulgaria or its
           people; "the Bulgarian capital is Sofia"
    n 1: a native or inhabitant of Bulgaria
    2: a Slavic language spoken in Bulgaria