Definition

Proper noun A major river in western Siberia, Russia. It is one of the longest rivers in the world, flowing generally northward and westward from its source in the Altai Mountains to its mouth at the Gulf of Ob, an inlet of the Kara Sea in the Arctic Ocean.

Usage

The term "Ob River" is used as a singular proper noun to refer to this specific geographical feature. It is typically preceded by the definite article "the." * The Ob River is a vital transportation route in Siberia. * Several large cities, like Novosibirsk, are located on the Ob River. * The Ob River basin is one of the largest drainage areas in the world.

Advanced Usage

• The Ob: A common shortened form used to refer to the river.
  • Fishing is important along the Ob.
• In geographical and hydrological contexts, it is often discussed in relation to its major tributary, the Irtysh River, with the combined Ob-Irtysh system being one of Asia's longest.

Variants and Related Words

• Gulf of Ob: The large bay at the mouth of the Ob River where it meets the Kara Sea.
• Ob-Irtysh: Refers to the combined river system of the Ob and its main tributary, the Irtysh River.

Synonyms

• The Ob (the common abbreviated name).

Noun

1. a major river of western Siberia; flows generally northward and westward to the Gulf of Ob and the Kara Sea