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

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

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

For a long time public television was the sole entry port for British shows, and it still waves that Union Jack.

From Los Angeles Times