- noun any of a wide variety of seals or packings used between matched machine parts or around pipe joints to prevent the escape of a gas or fluid
- Any of a variety of seals made from resilient materials and placed between two joining parts (as between a door and its frame, an oil filter and its seat, pipe threads and their fitting, etc.) to prevent the leakage of air, water, gas, or fluid.
- A flexible seal used between parts to maintain contact or prevent the escape of a fluid. For example, that used to form a seal between a speaker cone and its baffle.
- noun a piece of material, often a rubber or paper disc, used for sealing a joint between objects, e.g. pipes
Origin & History of “gasket”
Although it has never been established for certain, it seems likely that gasket may have originated as a word meaning ‘little girl’ – namely French garcette. This is a diminutive of grace ‘girl’, the feminine form of gars ‘boy’ (whence garçon). It is used figuratively for a ‘small rope’, and was originally borrowed into English in the 17th century as gassit, used as a nautical term for a ‘small rope for attaching a furled sail to a mast’. modern English gasket, first recorded in the early 17th century, seems to be an alteration of this. The main present-day sense ‘joint seal’ (originally made from tow or plaited hemp) developed in the early 19th century.