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.
Geri Halliwell's union jack flag platform boots are also among items featuring in the free exhibition at the Barbican Music Library, along with Liam Gallagher's tambourine and a Brit Award.
From BBC • Apr. 16, 2026
The Reform UK-led authority's £75,000 project started in December, with 164 union jack flags being fixed to lamp-posts in 82 areas across Nottinghamshire.
From BBC • Jan. 7, 2026
Farron's flag also featured a union jack in one corner.
From BBC • Sep. 20, 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
Stars and stripes are so-so—showy, perhaps; but my colours is the union jack, which I am told has the remarkable property of having braved a thousand years the battle and the breeze.
From The Letters of Charles Dickens Vol. 1, 1833-1856 by Hogarth, Georgina
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.
