occlusion
n. C / Un. a blockage or closing that stops something from moving through. In medicine, it often means a blood vessel is blocked; in computing, it means a screen is covered by another object.
n. the act of closing or the state of being closed, especially by an obstruction. In technical contexts, it refers to the blocking of a path or view by an intervening object.
The doctor checked for any occlusion in my arteries.
The software uses occlusion culling to hide objects that are blocked by walls, improving the game's performance.
A total occlusion of the coronary artery can lead to a heart attack if blood flow is not restored within minutes, highlighting the critical nature of immediate medical intervention.
Borrowed from Late Latin occlūsiō, occlūsiōnis (“occluding, obstruction”), from the Classical Latin occlūdō (“I shut up or close up; I restrain”), from ob + claudō (“I shut or close”).