1. (Science: ecology) A large stream of water flowing in a bed or channel and emptying into the ocean, a sea, a lake, or another stream; a stream larger than a rivulet or brook. Transparent and sparkling rivers, from which it is delightful to drink as they flow. (Macaulay)

2. A large stream; copious flow; abundance; as, rivers of blood; rivers of oil. River chub, any one of numerous fresh water tortoises inhabiting rivers, especially those of the genus trionyx and allied genera. See Trionyx.

Origin: F. Rivere a river, LL. Riparia river, bank of a river, fr. L. Riparius belonging to a bank or shore, fr. Ripa a bank or shore; of uncertain origin. Cf. Arrive, Riparian.

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