A monoplane is an aircraft design that features a single main wing. This type of airplane is distinct from biplanes, which have two wings stacked one above the other. Monoplanes are known for their efficiency and speed, as the single wing design reduces drag and allows for better aerodynamics. The development of monoplanes began in the early 20th century, with notable examples like the Boeing 747 and the Cessna 172. These aircraft have become the standard in modern aviation, offering improved performance and handling compared to older designs. Monoplanes are widely used for both commercial and private flying.