clearance

American  

[kleer-uhns] / ˈklɪər əns /

noun

1. the act of clearing.

2. the distance between two objects; an amount of clear space.

   The bridge allowed a clearance of 37 feet at mean high water.

3. a formal authorization permitting access to classified information, documents, etc.

4. Also called clearance sale.  the disposal of merchandise at reduced prices to make room for new goods.

   He bought the coat for half price at a clearance.

5. a clear space; a clearing.

   The house stood in a clearance among the trees.

6. Banking. an exchange of checks and other commercial paper drawn on members of a clearinghouse, usually effected at a daily meeting of the members.

7. Machinery. a space between two moving parts, left to avoid clashing or to permit relatively free motion.

8. the angle between a face of a cutting tool, as a lathe tool, and the work.

9. Nautical.

   1. the clearing of a ship at a port.

   2. Also called clearance papers.  the official papers certifying this.

10. Medicine/Medical. a test of the excretory function of the kidneys based on the volume of blood that is cleared of a specific substance per minute by renal excretion.

---

clearance British  

/ ˈklɪərəns /

noun

1. 1. the process or an instance of clearing

      slum clearance

   2. ( as modifier )

      a clearance order

2. space between two parts in motion or in relative motion

3. permission for an aircraft, ship, passengers, etc, to proceed

4. official permission to have access to secret information, projects, areas, etc

5. banking the exchange of commercial documents drawn on the members of a clearing house

6. 1. the disposal of merchandise at reduced prices

   2. ( as modifier )

      a clearance sale

7. sport

   1. the act of hitting or kicking a ball out of the defensive area, as in football

   2. an instance of this

8. the act of clearing an area of land of its inhabitants by mass eviction See Highland Clearances

9. dentistry the extraction of all of a person's teeth

10. a less common word for clearing

---

Other Word Forms

• nonclearance noun
• preclearance noun
• self-clearance noun

Etymology

Origin of clearance

First recorded in 1555–65; clear + -ance

Example Sentences

BBC News understands the vetting report returned a "no" verdict on whether a security clearance granting access to sensitive government material should be given to Mandelson.

From BBC • Apr. 18, 2026

There are several outcomes which the vetting process can result in beyond a straightforward awarding or refusal of clearance, according to the government's own guidance.

From BBC • Apr. 17, 2026

“Setting aside the unusual FCC clearance process here, the Court does not find Defendants’ arguments persuasive,” Nunley wrote.

From Los Angeles Times • Apr. 17, 2026

On Thursday, it emerged that Mandelson had, in fact, failed his security clearance but was approved for the job anyway.

From The Wall Street Journal • Apr. 17, 2026

The AEC Personnel Security Board hearing into J. Robert Oppenheimer’s security clearance convened on April 12, 1954, in the agency’s dilapidated headquarters, a temporary building on Washington’s National Mall left: over from wartime.

From "Big Science" by Michael Hiltzik

Related Words

• approval
• authorization
• consent
• go ahead
• green light