Definition

Proper noun: 1. A city in Illinois, USA: Rock Island is a city located in northwestern Illinois, United States. It is situated on the Mississippi River. The city is historically notable as the site of a major Union Army prison during the American Civil War.

Usage

• Rock Island is used as the official name of the city. It functions as a proper noun and is always capitalized.
• It is commonly used in geographical, historical, and administrative contexts.

Examples

• Geographical Context:
  • The Quad Cities metropolitan area includes Davenport, Bettendorf, Moline, East Moline, and Rock Island.
  • We crossed the bridge from Davenport, Iowa, into Rock Island, Illinois.
• Historical Context:
  • The Rock Island Arsenal, founded in 1862, is a key military facility.
  • During the Civil War, the Union operated a prison camp at Rock Island.

Advanced Usage

• The term can appear in compound names for local institutions and landmarks, such as Rock Island Arsenal, Rock Island County, or Rock Island State Park. In these cases, "Rock Island" remains a distinct proper noun forming part of a larger name.

Variants and Related Words

• The Quad Cities: The metropolitan region which includes Rock Island.
• Arsenal Island: An alternate name for the island housing the Rock Island Arsenal, located in the Mississippi River adjacent to the city.

Synonyms

• There are no direct synonyms for the proper noun "Rock Island." It can only be referred to by its name.

Notes on Meaning

• It is important to distinguish this proper noun from the literal phrase "rock island" (lowercase), which could descriptively refer to any island made of rock. The city name Rock Island is a single, specific entity.

Noun

1. a town in northwest Illinois on the Mississippi River; site of a Union prison during the American Civil War