sierra
n. countable C1 Advanced US //siˈɛɹə// UK //siːˈeəɹɐ// sier·ra
n. a long range of mountains with sharp, jagged peaks that look like the teeth of a saw.
n. a long, jagged mountain range with a serrated profile. Often used in geographical names in Spanish-speaking regions or the Western United States.
The sun set behind the high sierra.
The hikers spent three weeks crossing the rugged sierra, navigating steep passes and rocky ridges.
Geologists study the sierra to understand how tectonic forces pushed these jagged granite peaks upward over millions of years, creating a natural barrier that dictates the local climate.
Usage
Often appears as part of a proper name (e.g., Sierra Nevada) or with the definite article 'the'.