clear

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Related to cleared off: clear out

clear

1. emptied of freight or cargo
2. (of timber) having a smooth, unblemished surface
3. Showjumping (of a round) ridden without any fences being knocked down or any points being lost

clear

[klir]
(computer science)
To restore a storage device, memory device, or binary stage to a prescribed state, usually that denoting zero. Also known as reset.
A function key on calculators, to delete an entire problem or just the last keyboard entry.
(meteorology)
After United States weather observing practice, the state of the sky when it is cloudless or when the sky cover is less than 0.1 (to the nearest tenth).
To change from a stormy or cloudy weather condition to one of no precipitation and decreased cloudiness.
(navigation)
In marine navigation, to leave or pass safely, as to clear port or clear a shoal.
(ordnance)
To give a person a security clearance.
To operate a gun so as to unload it or make certain no ammunition remains; to free a gun of stoppages.

clear

The net distance, free from interruption, between any two surfaces or areas.

clear

i. In air traffic control, it means permitted to take off or land, cleared to carry out other maneuvers, or cleared to proceed under specified conditions. The activity the pilot is cleared to perform is either suffixed to the word clear, as in “clear to take off,” or it is in response to the request by the pilot as when “Permission to take off?” is answered by an air traffic controller's “Clear.”
ii. To rectify stoppage in an automatic weapon. Also to ensure its serviceability as in “clearing guns” (by firing a small burst into the air).
iii. Authorized to carry out any task as in “Clear to alter height” or “Clear to fly radial.”
iv. The area around the aircraft is clear for aircraft starting.
v. In reference to the sky, it is devoid of any clouds as in “clear sky.” The aircraft may also be in between layers but in VMC (visual meteorological conditions). Also means, “A portion of the sky is free or relatively free of clouds.”
vi. To check nearby airspace for safe airwork or maneuvering of aircraft.
vii. To clear an engine. To open the throttle of an idling reciprocating engine in flight to free it from carbon and/or an overrich mixture.
viii. To clear the air, meaning to gain a favorable air situation in a given sector.
ix. To authorize hardware as fit for use.
x. To fly over an obstacle without touching it (i.e., clear of obstacles).

CLEAR

(language)
A specification language based on initial algebras.

["An Informal Introduction to Specification Using CLEAR", R.M. Burstall in The Correctness Problem in Computer Science, R.S. Boyer et al eds, Academic Press 1981, pp. 185-213].
References in periodicals archive ?
Then Joe McMahon saw his goalbound header from a corner cleared off the line.
Richard Wood's header was cleared off the line by Jones, while Lonergan twice produced superb saves to deny Lukas Jutkiewicz.
After several chances for Paul McNally's side in the first half, it was Colin McDonald who broke the deadlock in the 67th minute when Alex Ryan's strike was cleared off the line straight to him.
Soon after the incident the workers of highway authorities cleared off the pieces of the rock.
Kerry Morgan and Marcus Griffiths also went close before Steve Williams' shot on the stroke of half-time was cleared off the line by Mitch Harrison.
First he saw a header cleared off the line by Diouf and, after another brilliant corner by Harte, h th and Pearce somehow headed wide from three yards.
James Husband had a clear-cut opening for the hosts but fired over after Kolodynski's clever dummy but the winner finally came when Blyth's header was cleared off the line by Dave Gilbert and from the resulting corner Kolodynski finished with the deftest of touches.
North End defender Billy Jones, who twice cleared off the line, broke the deadlock before on-loan Iain Hume opened his account for the club in first-half stoppage time with a stunning finish.
WELSH PREMIER Aberystwyth Town 2 Bangor City 1 HAVING hit the bar three times and with two other efforts cleared off the goal-line, unlucky Bangor deserved at least a point from last night's clash at Park Avenue.
Rhyl rallied and Leigh Pratt cleared off the line from Phil Doran before Tyrone Kirk set up Matthew Williams to make it 2-1.
The home side then took the lead on 18 minutes when Chris Moore's shot was cleared off the line but fell invitingly to Paul Chow who fired home.
Both Merthyr's strikers, Steins and Garry Shephard, had shots cleared off the goal-line, while Steve Williams forced home goalkeeper Lyall Beazley to turn his looping effort on to the crossbar.