Definition of "obstruction" []

• One that obstructs; an obstacle. See Synonyms at obstacle. (noun)
• The act or an instance of obstructing. (noun)
• The condition of being obstructed. (noun)
• The act of causing a delay or an attempt to cause a delay in the conduct of business, especially in a legislative body. (noun)
• Sports The act of impeding another player in a match or race. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Hutchison, claiming to be a supporter of the death penalty, is criticizing Perry for what she calls obstruction of an investigation into the execution of a child murderer in 2004."
• "Subpulmonic and supravalvar pulmonic stenosis do not get better with balloon dilation, and will require surgery if the amount of obstruction is moderate or severe."
• "Subaortic and supravalvar stenosis do not get better with balloon dilation, and will require surgery if the amount of obstruction is moderate or severe, or, with subaortic stenosis, the aortic valve begins to leak significantly."