Definition of Clearance

1. Noun. The distance by which one thing clears another; the space between them.

Generic synonyms: Interval, Separation
Derivative terms: Clear

2. Noun. Vertical space available to allow easy passage under something.
Exact synonyms: Headroom, Headway
Generic synonyms: Elbow Room, Room, Way

3. Noun. Permission to proceed. "The plane was given clearance to land"
Generic synonyms: License, Permission, Permit
Derivative terms: Clear

Definition of Clearance

1. n. The act of clearing; as, to make a thorough clearance.

Definition of Clearance

1. Noun. The act of clearing or something (such as a space) cleared ¹

2. Noun. The distance between two moving objects, especially between parts of a machine ¹

3. Noun. 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, headroom. ¹

4. Noun. A permission for a vehicle to proceed, or for a person to travel. ¹

5. Noun. A permission to have access to sensitive or secret documents or other information ¹

6. Noun. A sale of merchandise at a reduced price. ¹

7. Noun. (banking finance) The settlement of transactions involving securities or means of payment such as checks by means of a clearing house. ¹

8. Noun. (medicine) The removal of harmful substances from the blood; renal clearance. ¹

9. Noun. (sports billiards snooker pool) The act of potting all the remaining balls on a table at one visit. ¹

10. Noun. (soccer) The act of kicking a ball away from the goal one is defending. ¹

¹ Source:

Definition of Clearance

1. [n -S]

Medical Definition of Clearance

1. 1. The process of clearing. 2. The rate at which a substance is removed from the blood. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Clearance Pictures

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Lexicographical Neighbors of Clearance

clear one's lines
clear one's throat
clear out
clear round
clear sailing
clear someone's name
clear the air
clear the decks
clear the throat
clear title
clear up
clear view screen
clearance (current term)
clearance hole
clearance holes
clearance sale

Literary usage of Clearance

Below you will find example usage of this term as found in modern and/or classical literature:

1. International Library of Technology: A Series of Textbooks for Persons by International Textbook Company (1902)
"clearance. 47. Piston clearance.—When the crank is on a dead center, the piston is always a short distance from the cylinder head; this allowance is made so ..."

2. The Mechanical Engineer's Pocket-book: A Reference Book of Rules, Tables by William Kent (1902)
"-fl- 7 3, + 32 X 1.209-7 If the clearance be added to the stroke, so that clearance becomes zero, e same quantity of steam being used, admission 2 being ..."

3. American Machinists' Handbook and Dictionary of Shop Terms: A Reference Book by Fred Herbert Colvin, Frank Arthur Stanley (1914)
"Two clearance lines, A and B, are ground on the blades, a being the cutting clearance and b the second clearance called for in the table. ..."

4. The Law Reports by James Redfoord Bulwer (1872)
"Any member who had paid all his dues, on going from one of these towns to another, was entitled to a document called a " clearance," which admitted him to ..."

5. Mechanical Laboratory Methods: The Testing of Instruments and Machines in by Julian Chase Smallwood (1922)
"Linear clearance of a piston engine may be denned as the least distance ... Volumetric clearance is the cylinder volume between the piston and nearer ..."

6. The Steam-engine and Other Heat-engines by James Alfred Ewing (1894)
"clearance. When the piston is at either end of its stroke there is a small space left between it and the cylinder cover. This space, together with the ..."

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