The word drag has several meanings:
- In physics, drag consists of the sum of all the aerodynamic forces in the direction of the external airflow. It therefore acts to oppose the motion of the object. In a powered vehicle it is overcome by thrust. Types of drag include form drag, pressure drag, lift-induced drag, and wave drag. The overall drag of an object is characterized by a dimensionless number called the drag coefficient, and is calculated using the drag equation.
- In computing, to drag is to click the mouse button and hold it down while moving the mouse laterally.
- In music, to drag is to play slower than the indicated tempo. Dragging is usually unintentional and undesirable, since it tends to drain the energy out of the music.
- Drag is also slang for any costume, referring in particular to the ostentatiously glamorous costumes of the type worn by drag queens and kings. Since at least the days of vaudeville, any male entertainer costumed in women's clothing for a comedy sketch has been said to be "in drag." Milton Berle was especially known for such routines on early television. (Compare "drag role" for a man costumed as a woman with "pants role" for a woman costumed as a man.)
- Drag racing is a form of automobile racing.
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