Definition of Union Jack in English:

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Union Jack

Pronunciation: /ˈˌyo͞onyən ˈˌjak/


1The national flag of the United Kingdom, consisting of red and white crosses on a blue background.
Originally a small British union flag flown as the jack of a ship; compare with union
Example sentences
  • No chance of buying a Union Jack, Thai, Australian, Japanese, Scottish, Welsh, American, Korean or German flag now… sold out weeks ago.
  • Cheering crowds waving Union Jacks and the flag of Gurnard Sailing Club, where Shirley is a member, lined the route.
  • He also has a skull and crossbones which he hoists when his grandchildren visit, a Union Jack and a Yorkshire white rose - and he has no intention of getting rid of them.
2 (union jack) (In the US) a small flag consisting of the union from the national flag, flown at the bows of vessels in harbor.
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