Wordnet 3.0
NOUN (1)
1. 
 a city of central China; 
 capital of ancient Chinese empire 221-206 BC; 
[syn: Xian, Sian, Singan, Changan, Hsian]
WordNet (r) 3.0 (2006):
Singan
    n 1: a city of central China; capital of ancient Chinese empire
         221-206 BC [syn: Xian, Sian, Singan, Changan,
         Hsian]