- a common name for Union flag
Collins Concise English Dictionary © HarperCollins Publishers::
WordReference Random House Unabridged Dictionary of American English © 2020
Union Jack n
- 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.
- British Terms(often cap.) the British national flag.
- any flag the overall design of which is a union.
'Union Jack' also found in these entries: