Word.ws English Dictionary

Oak Brook

Oak Brook proper noun: a city in DuPage County and Cook County, Illinois, United States.

Proper noun

Oak Brook

  1. A city in DuPage County and Cook County, Illinois, United States.

Origin of Oak Brook

Named after a brook in the area with oaks along its banks. More on the name's history in Wikipedia at Oak Brook, Illinois § History.

Questions about Oak Brook

What does Oak Brook mean?
Oak Brook means a city in DuPage County and Cook County, Illinois, United States.
What part of speech is Oak Brook?
Oak Brook is a proper noun.

Words near Oak Brook in the dictionary

  1. oak apple
  2. Oak Apple Day
  3. oak apples
  4. Oak Bay
  5. Oak Bluffs
  6. Oak Brook
  7. Oak Cliff
  8. Oak Creek
  9. oak decline
  10. oak fern
  11. oak ferns

Source and license

Adapted from Wiktionary: Oak Brook (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Cite this entry: “Oak Brook.” Word.ws, https://word.ws/oak_brook. Based on Wiktionary, CC BY-SA 4.0.