CLEARANCE

n. 1 the removal of obstructions etc., esp. removal of buildings, persons, etc., so as to clear land. 2 clear space allowed for the passing of two objects or two parts in machinery etc. 3 special authorization or permission (esp. for an aircraft to take off or land, or for access to information etc.). 4 a the clearing of a person, ship, etc., by customs. b a certificate showing this. 5 the clearing of cheques. 6 Football a kick sending the ball out of a defensive zone. 7 making clear. clearance order an order for the demolition of buildings. clearance sale Brit. a sale to get rid of superfluous stock.