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
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
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
Howitt reverently wrapped the precious remains in the union jack, and, leaving them in their lonely grave, retraced his steps to Melbourne with the precious casket of papers, the last legacy of the dead heroes.
From Lippincott's Magazine of Popular Literature and Science Volume 15, No. 88, April, 1875 by Various
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.
