Clearance

Clearance can refer to:

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

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 (pharmacology), the rate at which a substance is removed or cleared from the body by the kidneys or in renal dialysis
 * 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