sierra Sierra • sierran · · · Info · Definitions · Synonyms · Characters · · sierra · · Text Latin · · Script 6 · · Length Definitions · · · (noun) a range of mountains (usually with jagged peaks and irregular outline). · · Noun Definition 1 (noun) a Spanish mackerel of western North America. Synonyms: Scomberomorus sierra. · · Noun Definition 2 Synonyms · · · scomberomorus sierra · · Synonym 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 i latin small letter i U+0069 r latin small letter r U+0072 s latin small letter s U+0073