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 A loading gauge is a diagram or physical structure that defines the maximum height and width dimensions in railway vehicles and their loads. Their purpose is to ensure that rail vehicles can pass safely through tunnels and under bridges, and ke ...

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 clearance car is a type of railroad car in maintenance of way service. Its purpose is to check the clearances around the tracks and ensure that trains conforming to the railroad's standard loading gauge or ''dynamic envelope'' will not encou ...

, 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 Collective rights management is the licensing of copyright and related rights by organisations acting on behalf of rights owners. Collective management organisations (CMOs), sometimes also referred to as collecting societies, typically represent ...

, 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 Customs is an authority or agency in a country responsible for collecting tariffs and for controlling the flow of goods, including animals, transports, personal effects, and hazardous items, into and out of a country. Traditionally, customs ha ...

, 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) In pharmacology, clearance is a pharmacokinetic measurement of the volume of plasma from which a substance is completely removed per unit time. Usually, clearance is measured in L/h or mL/min. The quantity reflects the rate of drug elimination div ...

, 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 The Highland Clearances ( gd, Fuadaichean nan Gàidheal , the "eviction of the Gaels") were the evictions of a significant number of tenants in the Scottish Highlands and Islands, mostly in two phases from 1750 to 1860. The first phase resulte ...

, eviction of tenants in the Scottish Highlands during the 18th and 19th centuries * The

Lowland Clearances The Lowland Clearances were one of the results of the Scottish Agricultural Revolution, which changed the traditional system of agriculture which had existed in Lowland Scotland in the seventeenth century. Thousands of cottars and tenant farmers ...