Clearance

• Renal clearance ratio, a relative measure of the speed at which a constituent of urine passes through the kidneys • Clearance (pharmacology), the rate at which a substance is removed or cleared from the body by the kidneys or in renal dialysis ==Engineering==

• Engineering tolerance, a physical distance or space between two components • Hydraulic clearance, in hydraulic systems • Clearance in civil engineering, including: • The difference between the loading gauge and the structure gauge: the amount of space between the top of a rail car and the top of a tunnel or the bottom of a rail car and the top of rail • Air draft, applies to bridges across navigable waterways • Clearance car, a type of railroad car used to check clearances around the tracks • Ride height or ground clearance, the amount of space between the base of an automobile tire and the underside of the chassis ==Finance and trade==

Intellectual property • Collective rights management, the licensing of copyright and related rights • Sample clearance, legal permission to re-use a recording in another work Other uses in finance and trade • Cheque clearing, the process of transferring value on a cheque from one bank account to another • The activity of a clearing house (finance), where a variety of financial instruments are cleared through the issuing institution • Customs clearance, in international trade, the movement of goods through customs barriers • Market clearing or equilibrium price, the price at which quantity supplied is equal to quantity demanded • Closeout (sale), in retail, the final sale of items to zero inventory ==Games and sports==

• Clearance (cue sports) • A chess term for removal of pieces so that a bishop, rook or queen is free to move • In Australian rules football, the clearing of the ball out of a ball-up situation ==Other uses==

• Authorization or permission from an authority • Air traffic control clearance in aviation • Security clearance, a status granted to individuals allowing them access to classified information • Clearance rate, in criminal justice, the number of crimes "cleared" divided by the number reported • Deforestation, the deliberate clearance of woodland or forest for human development • The Highland Clearances, eviction of tenants in the Scottish Highlands during the 18th and 19th centuries • The Lowland Clearances, eviction of tenants as part of the Scottish Agricultural Revolution in the Scottish Lowlands == See also ==