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.
And yet, in a parallel world, it could have been the red, white and blue of the union jack flying in her honour, and not that of the French flag.
From BBC • Feb. 18, 2026
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
And confetti cannons rained glitter over him as the brass bombast of Land of Hope and Glory rang out and a giant union jack appeared on the screen behind him.
From BBC • Sep. 20, 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
The stars and stripes were seen floating from many staffs, mingled with the tricolor of France and the English union jack.
From Air Service Boys Over The Rhine Fighting Above The Clouds by Beach, Charles Amory
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.
