clearance

clear +‎ -ance

clearance (countable and uncountable, plural clearances)

1. The act of clearing or something (such as a space) cleared
2. The distance between two moving objects, especially between parts of a machine
3. 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.
4. A permission for a vehicle to proceed, or for a person to travel.

   The plane got clearance from air traffic control, and we were off.

   He got clearance to travel to America, even though he had previous links to terrorists

5. A permission to have access to sensitive or secret documents or other information.
   • 2018 July 31, Julia Carrie Wong, “What is QAnon? Explaining the bizarre rightwing conspiracy theory”, in The Guardian‎:

     In a thread called “Calm Before the Storm”, and in subsequent posts, Q established his legend as a government insider with top security clearance who knew the truth about a secret struggle for power involving Donald Trump, the “deep state”, Robert Mueller, the Clintons, pedophile rings, and other stuff.

6. A permission to use something, usually intellectual property, that is legally, but not otherwise, protected.
7. (retail) A sale of merchandise, especially at significantly reduced prices in order to make room for new merchandise or updated versions of the same merchandise.
8. (banking, finance) The settlement of transactions involving securities or means of payment such as checks by means of a clearing house.
9. (medicine) The removal of harmful substances from the blood; renal clearance.
10. (sports, billiards, snooker, pool) The act of potting all the remaining balls on a table at one visit.
11. (soccer) The act of kicking a ball away from the goal one is defending.
    • 2010 December 29, Chris Whyatt, “Chelsea 1 - 0 Bolton”, in BBC‎:

      Bolton were then just inches from taking the lead, but the dangerous-looking Taylor drilled just wide after picking up a loose ball following Jose Bosingwa's poor attempted clearance.

12. (chess) Removal of pieces from a rank, file or diagonal so that a bishop, rook or queen is free to move along it.
13. Clear or net profit.

    (Can we find and add a quotation of Trollope to this entry?)

14. (Australian rules football) The first disposal in a chain that leaves the area of a stoppage, or a disposal that leaves the area of a stoppage itself.
15. (Australian rules football) The act of leaving the area of a stoppage.

English

clearance f (invariable)

1. (medicine) clearance

clearance m (plural clearances)

1. (medicine) clearance (removal of harmful substances from the blood)