from The American Heritage® Dictionary of the English Language, 4th Edition
- A river, about 1,488 km (925 mi) long, of western Russia flowing north, east, and northeast to join the Volga River near Nizhny Novgorod.
- A river rising in the Sayan Mountains of south-central Russia and flowing about 965 km (600 mi) generally north to the Angara River.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. A river in central Russia, the largest right tributary of the Volga.
- proper n. A certain village in the Canadian province of Quebec.
- n. A kind of pungent, semi-soft cheese, originally made by Trappist monks in Oka, Quebec.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. South American wood sorrel cultivated for its edible tubers
- n. a Turkish liquid unit equal to 1.3 pints
- n. a Turkish unit of weight equal to about 2.75 pounds
From Russian Ока. (Wiktionary)
From French, from Mohawk ("a kind of pike [fish]"). The cheese is named for the village. (Wiktionary)