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

The crowd waiting for the royals - many clutching mini union jack flags - shouted back "God save the King".

From BBC

In the terminal, there is a door decorated with a union jack print and walls hung with photos of significant British figures, including Winston Churchill.

From BBC

Sir Keir embraced British patriotism, using the union jack as a backdrop for speeches and getting his conference to sing God Save the King.

From BBC

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

The singer sported a Union Jack jester's hat for the traditional performance of Rule, Britannia! and blew kisses to the audience while singing Ruperto Chapí's tongue-twisting comic operetta Las Hijas Del Zebedeo.

From BBC