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  • union jack
    union jack
    noun
    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.
  • Union Jack
    Union Jack
    noun
    a common name for Union flag
Synonyms

union jack

American  

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 British  

noun

  1. a common name for Union flag

  2. (often not capitals) a national flag flown at the jackstaff of a vessel

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of union jack

First recorded in 1665–75

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

More than 150 union jack flags will be displayed in 82 locations in Rushcliffe, Broxtowe, Bassetlaw, Newark, Mansfield, Ashfield and Gedling.

From BBC Oct. 24, 2025

Initially, 164 union jack flags will be displayed at a cost of about £457 per flag including brackets, traffic management and cherry pickers.

From BBC Oct. 24, 2025

As protesters gathered outside the hotel again on Friday evening with banners and union jack and England flags, feelings on the High Street were mixed.

From BBC Aug. 29, 2025

St George and union jack flags have been hung up in public places across several locations in England in recent weeks.

From BBC Aug. 29, 2025

The flagstaff from which floated the union jack, the emblem of law and order, was planted in such a position as to be plainly visible in the mining camp.

From The Moving Finger A Trotting Christmas Eve at Warwingie Lost! The Loss of the "Vanity" Dick Stanesby's Hutkeeper The Yanyilla Steeplechase A Digger's Christmas by Gaunt, Mary

More than 1,000 people -- many waving Union Jack and England flags -- attended Tuesday's protest.

From Barron's Jun. 3, 2026

Skating to the ‘90s classic “Wannabe,” she wears Ginger Spice’s Union Jack dress, while partner Lewis Gibson dons a sequined version of Scary Spice’s leopard print.

From The Wall Street Journal Feb. 9, 2026

For a long time public television was the sole entry port for British shows, and it still waves that Union Jack.

From Los Angeles Times Dec. 29, 2025

Protesters started to gather outside the Bell in the hours after the judgement - with several Union Jack and St George's flags being waved.

From BBC Aug. 29, 2025

I don’t wave my Union Jack or cheer, because I see that it’s too late, I won’t have time for what I’ve been waiting for, which has only now become clear to me.

From "Cat's Eye" by Margaret Atwood

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