clearance

noun

clear·​ance ˈklir-ən(t)s 

1

: an act or process of clearing: such as

a

: the removal of buildings from an area (such as a city slum)

b

: the act of clearing a ship at the customhouse

also : the papers showing that a ship has cleared

c

: the offsetting of checks and other claims among banks through a clearinghouse

d

: certification as clear of objection : authorization

security clearance

e

: a sale to clear out stock

f

: authorization for an aircraft to proceed especially with a specified action

clearance to land

2

: the distance by which one object clears another or the clear space between them

3

: the volume of blood or plasma that can be freed of a specified constituent in a specified time by its excretion into the urine through the kidneys

a creatine clearance of 25 milliliters per minute

called also renal clearance

Synonyms

• allowance
• authorization
• concurrence
• consent
• granting
• green light
• leave
• license
• licence
• permission
• sanction
• sufferance
• warrant

Examples of clearance in a Sentence

She has a security clearance that allows her to see the classified information.

The pilot got clearance to land.

That flight has not received clearance for landing.

There was only 10 inches of clearance between the car and the side of the tunnel.

a bridge with a 100-foot clearance above the water

the clearance of forests for farming

slum clearance to make room for new housing

Recent Examples on the Web

After being hopeful to play in the championship, reigning Norris Trophy winner Quinn Hughes was downgraded to out Wednesday night for Thursday’s game after not getting medical clearance, his agent Pat Brisson said. —Lauren Merola, The Athletic, 20 Feb. 2025

The same can’t be said in Laos, where the U.S. provided almost 90% of international funding for unexploded ordnance clearance in 2022, according to the Landmine and Cluster Munition Monitor. —Anton L. Delgado, NBC News, 14 Feb. 2025

The company acknowledges the need to raise additional capital to continue executing its business plan, including obtaining regulatory clearance for its products under development. —Quartz Intelligence Newsroom, Quartz, 13 Feb. 2025

Many consumer devices undergo the FDA clearance process, such as LED masks and fitness trackers that have features like irregular heart rhythm or sleep apnea alerts. —Boutayna Chokrane, WIRED, 13 Feb. 2025

Word History

First Known Use

1540, in the meaning defined at sense 1

Phrases Containing clearance

• clearance sale
• renal clearance
• road/ground clearance
• security clearance

Rhymes for clearance

• adherence
• appearance
• coherence
• preclearance
• disappearance
• incoherence
• interference
• perseverance
• reappearance
• noninterference

Kids Definition

clearance

noun

clear·​ance ˈklir-ən(t)s 

1

a

: an act or process of clearing

b

: the act of clearing a ship at the customhouse

c

: the papers showing that a ship has cleared

d

: authorization for an airplane to proceed

2

: a sale to clear out stock

3

: the distance by which one object keeps from hitting or touching another or the clear space between them

Medical Definition

clearance

noun

clear·​ance ˈklir-ən(t)s 

: the volume of blood or plasma that could be freed of a specified constituent in a specified time (usually one minute) by excretion of the constituent into the urine through the kidneys

called also renal clearance