Wordnet 3.0
NOUN (1)
1. 
 a series of hills or mountains; 
- Example: "the valley was between two ranges of hills"- Example: "the plains lay just beyond the mountain range"[syn: range, mountain range, range of mountains, chain, mountain chain, chain of mountains]
WordNet (r) 3.0 (2006):
chain of mountains
    n 1: a series of hills or mountains; "the valley was between two
         ranges of hills"; "the plains lay just beyond the mountain
         range" [syn: range, mountain range, range of
         mountains, chain, mountain chain, chain of
         mountains]