D defs.my
Entry 3 senses Webster, 1913

Obstruction

/əb-strŭk'-shən/ · Ob·struc·tion · IPA /əbˈstɹʌk.ʃən/
01 n. The act of obstructing, or state of being obstructed.
  1. 1.
    The act of obstructing, or state of being obstructed.
  2. 2.
    That which obstructs or impedes; an obstacle; an impediment; a hindrance.
    “A popular assembly free from obstruction.” Swift.
  3. 3.
    The condition of having the natural powers obstructed in their usual course; the arrest of the vital functions; death.[Poetic]
    “To die, and go we know not where, To lie in cold obstruction, and to rot.” Shak.
    “Disparity in age seems a greater obstacle to an intimate friendship than inequality of fortune.” — Collier.
    “The king expected to meet with all the obstructions and difficulties his enraged enemies could lay in his way.” Clarendon.
Syn. Obstacle; bar; barrier; impediment; clog; check; hindrance.
-- Obstruction, Obstacle. The difference between these words is that indicated by their etymology; an obstacle is something standing in the way; an obstruction is something put in the way. Obstacle implies more fixedness and is the stronger word. We remove obstructions; we surmount obstacles.