'Across the pond' refers to the Atlantic Ocean between the United Kingdom and the United States of America. Before the 17th century, many large bodies of water were referred to as ponds. Bishop Joseph Hall called the collective oceans of the world 'the great pond' in his religious text 'Contemplations' in 1612, and in 1686, John Dunton referred to the Atlantic as the 'Great Herring Pond' in his letters about his journey from England to the 'new world'. Over time, this was shortened to 'Great Pond', then 'Pond'.

The first time the Atlantic Ocean was called the 'Pond' was in the 'Royal Gazette', a pro-British newspaper printed in New York in 1780. It recorded "Then Jack was sent across the Pond To take her in the rear, Sir."

The phrase 'across the pond' is still used today, particularly in the UK. There is a sense of irony when using the phrase because a pond is generally an artificial body of water. The Atlantic, on the other hand, is a large, unpredictable, natural body of water.

The Atlantic Ocean is the world's second-largest ocean, covering a total area of 106,400,000 square kilometres (41,100,000 square miles). It is named after the god Atlas from Greek mythology. It is bounded on the west by North and South America and connects to the Arctic Ocean through the Denmark Strait, Greenland Sea, Norwegian Sea and the Barents Sea. In the southeast, the Atlantic merges into the Indian Ocean, and in the southwest, it connects to the Pacific Ocean.

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