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.
(often initial capital letter) the British national flag.
any flag the overall design of which is a union.
a common name for Union flag
(often not capitals) a national flag flown at the jackstaff of a vessel
First recorded in 1665–75
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
A growing number of St George's and union jack flags have appeared across England in recent months.
From BBC ● Nov. 3, 2025
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
It gets to the heart of how many Britons' relationship with the union jack and the four nations' flags is complex.
From BBC ● Aug. 23, 2025
So he did not hoist the "union jack" on the foremast head, which means "Pilot come on board"; and the pilot did not come.
From Story Lessons of Character Building (Morals) and Manners by Bates, Loïs
The two-story brick building was repainted in Reform teal, a large picture of lions wearing Union Jack flags hung on one wall.
From The Wall Street Journal ● Jun. 22, 2026
More than 1,000 people -- many waving Union Jack and England flags -- attended Tuesday's protest.
From Barron's ● Jun. 3, 2026
An enthusiastic fan of the Royal Family who was reportedly nicknamed "The Union Jack Man" by the late Queen Elizabeth II has died, aged 91.
From BBC ● May 10, 2026
Bathory also dressed the part, drawing attention for his Def Leppard T-shirt with the Union Jack flag, studded leather jackets and belts, and long hair.
From Los Angeles Times ● Jul. 19, 2025
I can’t draw the Union Jack or sing “God Save the King” without thinking about them.
From "Cat's Eye" by Margaret Atwood
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
