Online Google Dictionary

clearances 中文解釋 wordnet sense Collocation Usage Collins Definition
Noun
/ˈkli(ə)rəns/,
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clearances, plural;
  1. The action or process of removing or getting rid of something or of something's dispersing
    • - cleaning of the machine should include clearance of blockages
    • - there will be sunny intervals after clearance of any early mist
  2. The removal of buildings, people, or trees from land so as to free it for alternative uses
    • - slum clearance accelerated during the 1960s
    • - forest clearances
  3. (in soccer and other games) A kick or hit that sends the ball out of a defensive zone

  4. Official authorization for something to proceed or take place
    • - getting diplomatic clearance to fly into or over a country is not always easy
  5. Official permission for someone to have access to classified information
    • - these people don't have clearance
  6. Permission for an aircraft to take off or land at an airport
    • - he took off without air traffic clearance
  7. The clearing of a person or ship by customs

  8. A certificate showing that such clearance has been granted

  9. The process of clearing checks through a clearinghouse

  10. Clear space allowed for a thing to move past or under another
    • - always give cyclists plenty of clearance
  1. (clearance) the distance by which one thing clears another; the space between them
  2. (clearance) headroom: vertical space available to allow easy passage under something
  3. (clearance) permission to proceed; "the plane was given clearance to land"
  4. The Highland Clearances (Fuadach nan Gàidheal, the expulsion of the Gael) were forced displacements of the population of the Scottish Highlands during the 18th and 19th centuries. They led to mass emigration to the sea coast, the Scottish Lowlands and the North American colonies. ...
  5. (Clearance (medicine)) In medicine, the clearance is a measurement of the renal excretion ability. Although clearance may also involve other organs than the kidney, it is almost synonymous with renal clearance or renal plasma clearance. ...
  6. (clearance) The act of clearing or something (such as a space) cleared; The distance between two moving objects, especially between parts of a machine; The height or width of a tunnel, bridge or other passage, or the distance between a vehicle and the walls or roof of such passage; a gap, ...
  7. (Clearance) The amount of side room, head room and back room required to properly install a sectional door
  8. (CLEARANCE) Formal instructions from air traffic control authorizing a specific route or action (climb or descend, entry into controlled airspace). Pilots may deviate from an ATC clearance in an emergency or when compliance would threaten safety of flight.
  9. (Clearance) the distance required by building and fire codes between stove, smoke pipe or chimney and combustible materials such as wood furniture or carpets. ...
  10. (clearance) The minimum distance through air measured between the surface of something heat-producing and the surface of something combustible.
  11. (clearance) The shortest distance between the lowest portion of a sign or awning and the finished grade level. Also called height above grade.
  12. (Clearance) when a player kicks the ball strongly away from the goal they are defending, usually to put a large distance between the ball and their goal.^[42]
  13. (Clearance) Rate that waste products in the blood are removed through dialysis expressed in millilitres/minute.
  14. (Clearance) The amount of space between two parts. For example, between a piston and a cylinder, between a bearing and a journal, etc.
  15. (clearance) The completion of customs entry requirements resulting in the release of goods to the importer.
  16. (CLEARANCE) in a reciprocating compressor cylinder is that volume contained in one end of the cylinder which is not swept by the movement of the piston. It includes space between piston and head at the end of the compression stroke, space under the valves, etc. ...
  17. (Clearance) The limiting dimensions of a rail shipment that would allow/prevent its clearing of tunnels and bridges.
  18. (Clearance) authorization from air traffic control to proceed as requested or instructed. Used for ground and air manoeuvring, thus "cleared for take-off", "cleared flight-planned route", "cleared to descend" etc.
  19. (Clearance) Distance from wall to back of the rod.
  20. (Clearance) The size beyond which vessels, cars, or loads cannot pass through, under, or over bridges, tunnels, highways, and so forth.
  21. Clearance is the shortest distance between two conductors through air or insulating medium.
  22. (clearance) (1) The gap or space between two mating parts. (2) Space provided between the relief of a cutting tool and the surface that has been cut.
  23. (Clearance) A clear space between building materials to allow for air flow or access.
  24. (clearance) In PeopleSoft Enterprise Campus Solutions, the period of time during which a constituent in PeopleSoft Contributor Relations is approved for involvement in an initiative or an action. ...
  25. (clearance) The removal of the toxic waste products of food from the body. Clearance is one of the two main functions of the kidneys. In kidney failure, clearance is inadequate and toxins from food build up in the blood.