clear‧ance /ˈklɪərəns $ ˈklɪr-/ noun
[Word Family: noun: clarity, clearance, clearing, clarification, clearness; verb: clear, clarify; adverb: clear, clearly; adjective: clear ≠ unclear]

1. [uncountable and countable] the process of getting official permission or approval for something:
She’ll race if she gets medical clearance from her doctor.
Morris did not have a security clearance.

2. [uncountable and countable] official permission for a plane to take off or land
clearance for
The pilot requested clearance for an emergency landing.

3. [uncountable and countable] the removal of unwanted things from a place:
the clearance of minefields
snow/land/slum etc clearance
flooding caused by forest clearance

4. [uncountable and countable] the amount of space around one object that is needed for it to avoid touching another object:
There was less than a foot’s clearance between the ship’s sides and the wharf.

5. [uncountable and countable] a process by which a cheque goes from one bank to another

6. [countable] an occasion when a player in a game such as football kicks the ball away from his or her goal

[TahlilGaran] Dictionary of Contemporary English ▲

clearance
noun
I. removal of sth old/unwanted
ADJ. forest, land, site, slum
CLEARANCE + NOUN work | sale (= in a shop when goods are sold cheaply to get rid of them quickly)

[TahlilGaran] Collocations Dictionary ▲

clearance
II. official permission
ADJ. official | customs, diplomatic, entry, security
VERB + CLEARANCE get, obtain, receive You'll need to get security clearance for this job.
apply for, seek | give sb, grant sb The pilot was granted clearance to land.
refuse sb

[TahlilGaran] Collocations Dictionary ▲

clearance
III. distance between sth and sth passing under/beside it
ADJ. ground We need to increase the vehicle's ground clearance.
VERB + CLEARANCE allow (sb/sth), give sb/sth, leave Make sure you allow enough clearance on each side. Always give cyclists plenty of clearance.
PREP. ~ above clearance above the light to prevent overheating
~ between There wasn't enough clearance between the bus and the top of the bridge.

[TahlilGaran] Collocations Dictionary ▲