ˌNelson's ˈColumn BrE AmE
a very tall ↑ column (=upright stone post) with a ↑ statue of Admiral ↑ Nelson on the top of it in ↑ Trafalgar Square in central London. It was built to honour Nelson, who was killed at the Battle of Trafalgar, where the British navy defeated the navy of Napoleon in 1805. It is one of the best-known sights in London.