thin

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thin

1. (of a photographic negative) having low density, usually insufficient to produce a satisfactory positive
2. Mountaineering a climb or pitch on which the holds are few and small
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

thin

[thin]
(meteorology)
In aviation weather observations, the description of a sky cover that is predominantly transparent.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
A couple of months later, I'd scrapped the idea of a Scottish crime novel and then I DID take a look at Thin Air with fresh eyes.
'I don't think it's something that the President would say from thin air because he has access to all information that even you and I don't have access to,' he said.
In shock, I tell you that your money is not real because you created it out of thin air. You did nothing to earn the money, therefore, it is not real.
He added: "We suggest that the defendant has conjured up a defence out of thin air."
Admission is just PS5, doors are 9pm and The Thin Air DJs will be spinning a veritable rake of psych-tinged tunes throughout.
The Tory-led coalition government will perform their biggest disappearing act ever by suddenly vanishing into thin air. Now you see them, now you don't.
In the first week of December, equity analysts at Goldman Sachs warned London's blue-chip index - the FTSE 100 - was about to see more than 15% of its value evaporate into thin air, with a plunge to around 4,700 by February 29.
STRICTLY Come Dancing bad boy Brendan Cole has launched a stinging attack on his X Factor rivals - claiming they are creating careers from "thin air".
The advice was issued by David Waller, assistant finance director for adults and communities, who said the council could not "magic money out of thin air".
"I will never forget the moment when my dream became reality when I saw the prayer flags flapping in the thin air, marking the summit of the mountain," she said.