union jack

noun

1. a jack consisting of the union of a national flag or ensign, as the U.S. jack, which has the white stars and blue field of the union of the U.S. national flag.
2. (often initial capital letter) the British national flag.
3. any flag the overall design of which is a union.

Union Jack

noun

1. a common name for Union flag
2. often not capitals a national flag flown at the jackstaff of a vessel

Word History and Origins

Origin of union jack¹

First recorded in 1665–75

Example Sentences

With a giant Union Jack flag draped above his head, Nigel Farage received a hero’s welcome as he arrived at Reform UK’s conference in Birmingham on Friday.

From BBC

China and Taiwan were visible, as well as the Union Jack and the United Nations.

From BBC

Reports of training programmes and visits from senior UK military figures, including then-defence secretary John Nott in 1981, run alongside adverts for the English Wives Club and Union Jack groceries shop.

From BBC

The nine men, aged between 98 and 103, gathered at the Union Jack Club, near Waterloo, on Friday.

From BBC

Bearing the red, white and blue of the Union Jack, kit manufacturer Adidas says the collection "celebrates the unique aspects of Great Britain".

From BBC