Definition of sierra noun from the Oxford Advanced Learner's Dictionary

 

sierra

 noun
noun
BrE BrE//siˈerə//
 
; NAmE NAmE//siˈerə//
 
 
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(especially in place names) a long range of steep mountains with sharp points, especially in Spain and America the Sierra Nevada Word Origin mid 16th cent.: Spanish, from Latin serra ‘saw’.
See the Oxford Advanced American Dictionary entry: sierra