The term can refer to two different types of beverage:
In the UK, the suffix 'ade' means a carbonated sweet soft drink; hence limeade, orangeade, cherryade, etc.
American-style lemonade exists in the UK as a 'homemade' drink (also called lemonade or "lemon crush"), but is only rarely sold commercially under that name. A carbonated version is commonly sold commercially as 'cloudy' or 'traditional' lemonade. There are also similar uncarbonated products, lemon squash and lemon barley water, both of which are usually sold as a syrup which is diluted to taste.
In Ireland, lemonade refers to the carbonated, lemon-flavored soft drink but is further sub-divided into white lemonade and red lemonade. White lemonade equates to the colourless fizzy lemonade common in many countries, while red lemonade is particular to Ireland. Red lemonade differs slightly in taste from white lemonade and is either drunk neat or as part of a whiskey mixer.
In Vietnam, it is called nước chanh, a mix of water, lime or lemon juice, sugar, salt, and is usually not carbonated.
Lemonade, as the name suggests, is made from lemons. When combined with sugar, it gives a pleasant mixture of sour and sweet to produce a flavor very agreeable to the taste buds.
The New York Times credited Henry E. "Bunk Allen" Allott as the inventor of pink lemonade in his obituary:
At 15 he ran away with a circus and obtained the lemonade concession. One day while mixing a tub of the orthodox yellow kind he dropped some red cinnamon candies in by mistake. The resulting rose-tinted mixture sold so surprisingly well that he continued to dispense his chance discovery.However, this is disputed by historian Joe Nickell, who claims that it was Pete Conklin who first invented the drink in 1857 when he used water dyed pink from a horse rider's red tights to make his lemonade.