Pecos Pecora • pectase · · · Info · Definitions · Characters · · Pecos · · Text Latin · · Script 5 · · Length Definitions · · · (noun) a tributary of the Rio Grande that flows southeastward from New Mexico through western Texas. Synonyms: Pecos River. · · Noun Definition 1 Characters · · P latin capital letter p U+0050 c latin small letter c U+0063 e latin small letter e U+0065 o latin small letter o U+006F s latin small letter s U+0073