Definition

Proper noun: * The Mackenzie River: A major river system in northwestern Canada. It is the longest river system in Canada and flows northward from Great Slave Lake into the Beaufort Sea, a part of the Arctic Ocean.

Usage

The term "Mackenzie River" is used as a proper noun to name this specific geographical feature. It is typically preceded by the definite article "the." * The Mackenzie River basin is one of the largest and most intact ecosystems in North America. * Explorer Alexander Mackenzie navigated the river to reach the Arctic Ocean in 1789.

Advanced Usage

• The river is a critical part of the phrase "Mackenzie River Delta," which describes the vast, ecologically rich area where the river fans out and meets the Beaufort Sea.
  • The Mackenzie River Delta is an important habitat for migratory birds.

Variants and Related Words

• Mackenzie (proper noun): A common shortened form used attributively or in certain contexts.
  • The Mackenzie valley is sparsely populated.
  • Mackenzie's expedition was a landmark achievement.

Synonyms

• Watercourse
• River system
• Fluvial artery (formal)

Related Phrases

• To flow into: This phrase describes the river's terminus.
  • The Mackenzie River flows into the Beaufort Sea.
• Headwaters / Source: Refers to the river's origin.
  • The headwaters of the Mackenzie River are in the Rocky Mountains.
• Tributary: A river or stream flowing into a larger one.
  • The Liard River is a major tributary of the Mackenzie.

Noun

1. a Canadian river; flows into the Beaufort Sea