obstruction

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Related to chronic airflow obstruction: obstructive airway disease

obstruction

Politics delay of business, esp in a legislature by means of procedural devices
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

obstruction

[əb′strək·shən]
(medicine)
Occlusion or stenosis of hollow viscera, ducts, and vessels.
(navigation)
Anything that hinders or prevents movement, particularly anything that endangers or prevents passage of a vessel or aircraft; usually refers to an isolated danger to navigation, such as a submerged rock or pinnacle in the case of marine navigation, and a tower, tall building, mountain peak, and so forth, in the case of air navigation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

obstruction

obstruction
Obstructions are marked by orange and white colours as well as by lights.
An existing object, object of natural growth, or terrain that is hazardous to an aircraft if the obstruction is on or near the runway or in the flight path. For purposes of certification, an object becomes an obstruction if its height is 35 ft (10.7 m) or 50 ft (15 m).
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
Because smoke-induced pathologic abnormalities in the small airways are one of the causes of chronic airflow obstruction in cigarette smokers, the observation of chronic airflow abnormalities in individuals with chronic high PM exposures suggests that PM exposure might also produce morphologic changes in the small airways.
Although there is epidemiologic evidence indicating that chronic exposure to PM is associated with chronic airflow obstruction, the anatomic basis of this effect is unknown.
Our results suggest that atopic mechanisms should not be overlooked as an aetiological factor in older adults with asthma or chronic airflow obstruction.

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