OBSTRUCT definition: to block or close up with an obstacle; make difficult to pass. See examples of obstruct used in a sentence. Definition of obstruct verb in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. To block or hinder the movement, progress or actions of something or someone. English dictionary definition, meaning, audio pronunciation, examples, synonyms, and etymology. obstruct (verb) obstruct /əb ˈ strʌkt/ verb obstructs; obstructed; obstructing Britannica Dictionary definition of OBSTRUCT [+ object] somewhat formal 1 : to block (something, such as a pipe or street) so that things cannot move through easily When you obstruct something, you block it. If you’re gobbling down your pizza, a chunk of crust you didn’t chew so well might obstruct your airway and you'll choke. The meaning of OBSTRUCT is to block or close up by an obstacle. How to use obstruct in a sentence. Synonym Discussion of Obstruct. 3 meanings: 1. to block (a road, passageway, etc) with an obstacle 2. to make (progress or activity) difficult 3. to impede or. Click for more definitions. OBSTRUCT definition: 1. to block a road, passage, entrance, etc. so that nothing can go along it, or to prevent…. Learn more. Find the meaning of obstruct with clear definitions, IPA pronunciation, real-life examples, synonyms, and word origin. Define obstruct. obstruct synonyms, obstruct pronunciation, obstruct translation, English dictionary definition of obstruct. tr.v. ob·struct·ed , ob·struct·ing , ob·structs 1. To block or fill with obstacles or an obstacle. 2. To impede, retard, or interfere with; hinder.