Obstacle - Definition
obstacle
n 1: something immaterial that stands in the way and must be
circumvented or surmounted; "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" [syn:
obstacle, obstruction]
2: an obstruction that stands in the way (and must be removed or
surmounted or circumvented)