What does blockage mean?
Blockage refers to something that obstructs a passage, channel, or vessel, halting the flow of whatever should move through it — water in a pipe, traffic in a tunnel, blood in an artery, or air in an airway. The word carries no inherent judgment; it describes a state of being blocked rather than assigning blame, which makes it useful across registers from household conversation ('the sink has a blockage') to technical and medical writing. Its figurative sense extends the idea to non-physical realms: a blockage can be a bureaucratic delay, a creative impasse, or any barrier standing between effort and outcome. Closely related to but distinct from 'blockade', which implies deliberate isolation, blockage typically suggests accidental or natural obstruction. It is a practical, high-frequency noun whose clarity makes it indispensable wherever things are supposed to move freely and, for one reason or another, cannot.
An obstruction that stops movement or flow through a passage, pipe, channel, or vessel.
"A build-up of leaves caused a blockage in the gutter."
Countable: usually 'a blockage'; plural 'blockages' when referring to multiple obstructions.
(Medicine) An occlusion of a blood vessel, duct, or other bodily passage.
"The scan showed a blockage in the bile duct."
Something that hinders or impedes progress, used figuratively.
"Bureaucratic delays proved a major blockage to the project's approval."
Regular plural; used when referring to multiple obstructions, e.g. several blocked arteries or repeated drain problems.
"The angiogram revealed multiple blockages in her coronary arteries."
Doctors speak of 'clearing a blockage' in arteries much as plumbers do in pipes — one word quietly links your kitchen sink to your cardiovascular system.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of blockage
Blockage derives from the English verb 'block', meaning to obstruct, combined with the noun-forming suffix '-age'. The root traces back through Old French 'bloquer' and Middle Dutch 'blok' ('tree trunk, block'), reflecting the original image of a solid piece of wood placed in the way. The '-age' suffix itself came into English from French, giving the word its distinctly Gallicized form. Its relatives include 'blockade', 'blockhouse', and the political term 'bloc', all sharing the notion of a solid mass used to stop or shape something.
How blockage is actually used
Neutral register, common in both everyday and technical contexts. In British English especially, 'a blockage' is the standard everyday term for a blocked drain or toilet; in medicine, 'occlusion' is the more formal synonym, while 'blockage' remains widely understood.
Easily confused with blockage
A blockade is the deliberate sealing-off of a place or route (usually military or political), while a blockage is an accidental or physical obstruction within a passage or system.