dirty

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dirty

1. (of a colour) not clear and bright; impure
2. (of an aircraft) having projections into the airstream, such as lowered flaps
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

dirty

An aircraft configuration in flight with the undercarriage and/or flaps down. Airbrakes or spoilers may or may not be extended.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in classic literature ?
We drove slowly through the dirtiest and darkest streets that ever were seen in the world (I thought) and in such a distracting state of confusion that I wondered how the people kept their senses, until we passed into sudden quietude under an old gateway and drove on through a silent square until we came to an odd nook in a corner, where there was an entrance up a steep, broad flight of stairs, like an entrance to a church.
THE cleanest - and the dirtiest - streets in Wales have been revealed in a new survey released by Keep Wales Tidy.
KARACHI -- According to a Gilani Research Foundation Survey carried out by Gallup and Gilani Pakistan, Karachi tops the list as the city perceived as the dirtiest of Pakistan.
KARACHI: According to a Gilani Research Foundation Survey carried out by Gallup and Gilani Pakistan, Karachi tops the list as the city that is considered the dirtiest of Pakistan.The survey included a gender-inclusive sample population from all four provinces who were asked: "In your opinion, which city of Pakistan is the dirtiest?"In response to this question, 25pc said Karachi, 11pc said Lahore, 7pc said Peshawar, 5pc said Faisalabad, 4pc said Shikarpur, 3pc each said Quetta, Sukkur, Multan and Sahiwal, 24pc referred to other cities of the country, 4pc said none, while 8pc did not know or did not wish to respond.
GOVERNORSHIP candidate of Lagos State chapter of Peoples Democratic Party (PDP), Mr Jimi Agbaje, has promised to move the state from the league of dirtiest cities in the world to one of the neatest and cleanest.
It's the dirtiest and worst kind of coal," he said.
The dirtiest air is in Sofia, nearly 4 times above the average daily standard of 50 I1/4g per cu m.
Mr Kang'ata said during the ongoing meeting, together with Tharaka-Nithi Governor Muthomi Njuki and Kisii's James Ongwae, who are representing the Council of Governors, they took the advantage of the opportunity to lobby for the machines which he said have the capacity to purify the dirtiest water including sewage effluent and salty water.
In February, a passenger complained "this was the dirtiest taxi I've ever had the displeasure of sitting it.
Analysts said the vote was too close to call as polls closed at 6:00 pm (1300 GMT), despite widespread allegations of pre-poll meddling in favour of Khan, which saw the process dubbed Pakistan's "dirtiest election".
Malaysian ex-leader Mahathir Mohamad warned elections next month will be the dirtiest in the country's history but insisted his opposition alliance has a fighting chance.