Nelson, Horatio, Viscount. Born in 1758. English admiral, son of a Norfolk clergyman. Entered the navy in 1770. Served in the American War and under Lord Hood in the war with revolutionary France, becoming commodore in 1796 and rear-admiral after the battle of Cape St. Vincent, 1797. In the following year Nelson won the battle of the Nile, for which he was made baron, and in 1801, brilliantly disobeyed Sir Hyde Parker, by attacking Copenhagen. After this, he commanded in the Mediterranean, and on October 21, 1805, saved England from invasion by his defeat of the combined French and Spanish fleets at Trafalgar, but fell in the action.