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 ?
Entering the room, they discovered through a thick cloud of tobacco smoke, a small, fat, bald-headed, dirty, old man, in an arm-chair, robed in a tattered flannel dressing-gown, with a short pipe in his mouth, a pug-dog on his lap, and a French novel in his hands.
"It's dirty," replied Prince Andrew, making a grimace.
Lucy was too entirely absorbed by the evil that had befallen her,--the spoiling of her pretty best clothes, and the discomfort of being wet and dirty,--to think much of the cause, which was entirely mysterious to her.
And I must leave all this"--he waved his arm round the dirty garret, with its unmade bed, the clothes lying on the floor, a row of empty beer bottles against the wall, piles of unbound, ragged books in every corner--"for some provincial university where I shall try and get a chair of philology.
He slept in the office that was unspeakably dirty and dined at Biff Carter's lunch room in a small frame building opposite the railroad station.
But I suppose they thought it would be too dirty for a walk."
If that thing means anything useful, then it means that I should at once alter the course away, away to the devil somewhere, and come booming down on Fu-chau from the northward at the tail of this dirty weather that's supposed to be knocking about in our way.
'Containing a position which I deny,' interrupted he of the dirty countenance.
"And besides, they're not dirty. They've all had a bath this morning.
They want that dirty ice cream, that they do know for certain," she thought, looking at two boys stopping an ice cream seller, who took a barrel off his head and began wiping his perspiring face with a towel.
The "dirty little boy" fell back a step and looked toward the door.
Moss's house, though somewhat dirty, was splendid throughout.