obstruction-n; 3 Senses

Sense Number 1: a thing, concrete or abstract, which is an obstacle

Commentary: OBSTRUCTION[+structure][+obstacle][+physical/+abstract]
NOTE: implies an existing thing or situation, not a specific action (see Sense 2)
NOTE: usually refers to the one who must confront the obstacle

John drove carefully around the obstruction in the middle of the road.
Bars on windows are effective obstructions to home intruders.
His basic insecurity has been an obstruction to getting a better job. (figurative)


Sense Number 2: an action or maneuver that hinders someone/something

Commentary: OBSTRUCTION[+action][+maneuver][+hindering]
NOTE: implies an agent performing an action
NOTE: refers to the one creating a hindrance or obstacle

They will use the filibuster as an obstruction to getting the bill passed. (political act)
His destruction of the evidence is interpreted as an obstruction of justice.
The referee gave a penalty to the player for his obstruction of the ball.

WordNet 3.0 Sense Numbers: 4, 5

Sense Number 3: a physiological state of blockage

Commentary: OBSTRUCTION[+state][+physiological][+blocked]

The doctor determined the patient had an obstruction in the lower intestines.
Before attempting mouth-to-mouth resuscitation, remove any obstructions from the victim's throat.
Chicken bones can create obstructions in dogs' bowels.

WordNet 3.0 Sense Numbers: 2