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

dirty

An aircraft configuration in flight with the undercarriage and/or flaps down. Airbrakes or spoilers may or may not be extended.
References in periodicals archive ?
Also, the tube of the stethoscope was dirtier than the back of the physician's hand.
Both Roberts and Katz said that the ice is likely dirtier because machines aren't cleaned and people use unwashed hands to scoop ice.
She added: "I think that standards are falling and that Britain is becoming dirtier - people don't seem to have noticed this.
LONDON: Energy consumption among rich and developing countries got cleaner and dirtier respectively last year, in a starker than ever trend which reinforces how global climate action is now in the hands of emerging economies.
Male workers were found to have dirtier workstations.
But no, they have just got dirtier and dirtier until they are a uniform grey
32bn) to improve its power generation and distribution, halving its reliance on dirtier coal-fired plants with investments in nuclear and renewable energy.
and a dirty war is about to get a whole lot dirtier.
Dirtier, noisier and more stressful too - 50,000 people a year are now dying through poor air quality in our cities.
Most of that 'saved' gasoline will likely be burned somewhere else with potentially dirtier technology, such as China.
When financial times get tough, some take it as a sign to play dirtier.