ob·struc·tion 
/əbˈstrʌkʃən/ noun
plural ob·struc·tions /əbˈstrʌkʃən/ noun 1 [count] : something that blocks something else and makes it difficult for things to move through
▪ They are removing trees and other obstructions from the path. ▪ There were obstructions [=blockages] in his blood vessels. 2 : the condition of being blocked so that things cannot move through easily [noncount] ▪ cases of intestinal obstruction in children [count] ▪ She died from an obstruction of the airway. 3 [noncount] : the act of making it difficult for something to happen or move forward
▪ He is on trial for the obstruction of a criminal investigation. ◊Obstruction of justice is the crime of trying to stop police from learning the truth about something.
▪ He is being charged with obstruction of justice for lying to investigators.
▪ They are removing trees and other obstructions from the path. ▪ There were obstructions [=blockages] in his blood vessels.
▪ He is on trial for the obstruction of a criminal investigation. ◊Obstruction of justice is the crime of trying to stop police from learning the truth about something.
▪ He is being charged with obstruction of justice for lying to investigators.
