Clearance

A clearance can refer to:

• in chess, A positional move, where a player moves a piece occupying a certain square away, replacing it with an allied piece that will strengthen the player's position.
• in engineering and safety, a physical distance or space tolerance, as in a truck (lorry), train or boat under a bridge as well as a train in a tunnel (see structure gauge and loading gauge).
  • in mechanical engineering, the space between a bolt and a hole, etcetera.
• The distance between two electrical conductors in a gas medium.
• a closeout or final sale
• an authorization or permission from an authority, for example:
  • a security clearance
  • an ATC clearance in aviation.
• in criminal justice, the clearance rate is the number of crimes "cleared" divided by the number reported
• Clearance (medicine), the rate at which a substance is removed or cleared from the body by the kidneys or in renal dialysis.
• in Australian rules football, the clearing of the ball out of a stoppage situation, to the advantage of one team or the other
• the Highland Clearances, forced displacements of people in Scotland in the 18th and 19th centuries

See also

• Clearing (disambiguation)