/ Dictionary / Index O oka: Meaning and Definition of Find definitions for: o•ka Pronunciation: (ō'ku), [key] — n. a unit of weight in Turkey and neighboring countries, equal to about 2 pounds (1.25 kilograms). a unit of liquid measure, equal to about 1 U.S. liquid quarts (1.26 liters). o•ka Pronunciation: (ō'ku), [key] — n. oca. O•ka Pronunciation: (ō-kä' Russ. u-kä'), [key] — n. a river in the central Russian Federation in Europe, flowing NE to the Volga at Nizhni Novgorod. 950 mi. (1530 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: oka (Thesaurus) OK okapi Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language