union jack

American  

noun

1. 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.

2. (often initial capital letter) the British national flag.

3. any flag the overall design of which is a union.

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Union Jack British  

noun

1. a common name for Union flag

2. (often not capitals) a national flag flown at the jackstaff of a vessel

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Etymology

Origin of union jack

First recorded in 1665–75

Example Sentences

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

Skating to the ‘90s classic “Wannabe,” she wears Ginger Spice’s Union Jack dress, while partner Lewis Gibson dons a sequined version of Scary Spice’s leopard print.

From The Wall Street Journal

Michelle Lumber later became aware of sirens across the road and went out to find her husband being treated by paramedics, with his ladder nearby and a Union Jack flag on a lamppost.

From BBC

The pair, known as the 'Disco Brits' for their flashy and confident performances -Fear was in a sparkling Union Jack dress here, reminiscent of Ginger Spice - brought their very best for the delighted home crowd at Utilita Arena.

From BBC

Nottinghamshire County Council has said it is "extremely disappointed" after one of its union jack flag banners was vandalised in Newark.

From BBC