Definition: a barrier set up by police to stop traffic on a street or road in order to catch a fugitive or inspect traffic etc.
Similar words: barrier
Definition: a structure or object that impedes free movement
Definition: any condition that makes it difficult to make progress or to achieve an objective
Usage: intolerance is a barrier to understanding
Definition: something immaterial that stands in the way and must be circumvented or surmounted
Usage: lack of imagination is an obstacle to one's advancement; the poverty of a district is an obstacle to good education; the filibuster was a major obstruction to the success of their plan