Noun: clearance kleer-un(t)s
- The distance by which one thing clears another; the space between them
"The clearance between the car and the garage ceiling was barely enough"; "The ship needed a certain clearance to pass under the bridge"
- Vertical space available to allow easy passage under something
"The bridge didn't have enough clearance for large trucks";
- headroom, headway
- Permission to proceed
"the plane was given clearance to land"
- Official permission or approval
"clearance for the program was renewed several times";
- authority, authorization, authorisation [Brit], sanction
- (medicine) the rate of removal of substances from the blood
"The drug had a high clearance rate, quickly leaving the bloodstream"
Derived forms: clearances
Type of: elbow room, interval, licence [Brit, Cdn], license [N. Amer], permission, permit, room, separation, way
Encyclopedia: Clearance