Cimarron [sim-uh-ron, -rohn, -er-uh n; sim-uh-rohn] noun a river flowing E from NE New Mexico to the Arkansas River in Oklahoma. 600 miles (965 km) long. Liberaldictionary.com Is It Time For All Couples To Use The Term Partner? Can You Translate These Famous Phrases From Emoji? These Are the Longest Words in English These Are the Saddest Phrases in English Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019