English Reference
noun

obstruction

n.
US /əbˈstɹəkʃən/ UK /ɒbstɹˈʌkʃən/ ob·struc·tion UK spelling obstruction's, obstruction's

  1. 01 B2 Upper Intermediate

    something that blocks a road, pipe, or path so that nothing can get through.

    a physical object that blocks or impedes passage through a conduit, thoroughfare, or anatomical passage.

    Simple

    The plumber found a small plastic toy causing an obstruction in the kitchen pipe.

    In context

    Emergency crews worked through the night to remove the fallen tree, which had created a significant obstruction on the main highway.

  2. 02 B2 Upper Intermediate

    the act of intentionally stopping someone or something from making progress.

    the deliberate or accidental act of hindering or preventing progress or movement.

    Simple

    The lawyer was accused of obstruction of justice for hiding important documents.

    In context

    The protesters were arrested for the obstruction of a public thoroughfare after they refused to move from the bridge.

  3. 03 B2 Upper Intermediate Sport

    an illegal move where a player blocks an opponent who does not have the ball.

    an infringement of the rules in which a player uses their body to impede the progress of an opponent.

    Simple

    The referee blew the whistle and called obstruction against the defender.

    In context

    The striker was awarded a free kick after the defender was penalised for obstruction in the penalty area.

    Usage

    Often used as an uncountable noun when referring to the foul itself.

An expert might suggest treating nasal obstruction or allergies, if this is what is causing snoring, or wearing a custom mouthguard to gently push the lower jaw forward and keep the airway open.

BBC News· 10 Sept 2026

From Latin obstructio (“hindrance”), from obstruo (“build against, block, stop”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Latin obstructio
Level B2 · Upper Intermediate
Frequency Frequent
Updated