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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 classic literature ?
it said, and then again, sweeter and clearer than before, "Archie
The heat was tempered by a light western breeze; the voices of laborers at work in a field near reached the house cheerfully; the clock-bell of the village church as it struck the quarters floated down the wind with a clearer ring, a louder melody than usual.
In both countries it was clearer than crystal to the lords of the State preserves of loaves and fishes, that things in general were settled for ever.
A fire had been lately kindled in the damp old-fashioned grate, and it was more disposed to go out than to burn up, and the reluctant smoke which hung in the room seemed colder than the clearer air - like our own marsh mist.
It was an influence which must gather force with every new year: the tones that stirred Silas's heart grew articulate, and called for more distinct answers; shapes and sounds grew clearer for Eppie's eyes and ears, and there was more that "Dad-dad" was imperatively required to notice and account for.
Of course," I stammered, "I cannot expect you to understand the situation, though I think, if you would allow me, I could in a very few words make it somewhat clearer,--make you realise that, after all, it has been a very innocent and childish escapade, in which there has been no harm and a great deal of pleasure--"
The sums are the scoundrel's share, and where he feared an ambiguity, you see he added something clearer.
I followed it for what seemed to me many miles, and at last saw before me a glimmer of light which grew clearer every moment until I emerged upon the sea shore with a joy which I cannot describe.
Then Ferko buried his face in the ground till his eyes were damp with dewdrops, and in a moment he saw clearer than he had ever done in his life before.
Yes, I will," said Sancho, in a great rage; "but I'd like it to be with cleaner towels, clearer lye, and not such dirty hands; for there's not so much difference between me and my master that he should be washed with angels' water and I with devil's lye.
Two hours had elapsed before my sensations had so far subsided as to leave me calm enough to remark for what wider and clearer boundaries I had exchanged that sooty girdle.
Not at all, my good sir, I said; I am trying to understand them; and I wish that you would be a little clearer.