| Gasket 1. (n.) A line or band used to lash a furled sail securely. Sea gaskets are common lines; harbor gaskets are plaited and decorated lines or bands. Called also casket. 2. (n.) The plaited hemp used for packing a piston, as of the steam engine and its pumps. 3. (n.) Any ring or washer of packing. Thesaurus Entries air hole, armhole, blowhole, bullet-hole, bunghole, cringle, deadeye, eye, eyelet, gland, grommet, guide, keyhole, knothole, loop, loophole, manhole, mousehole, packing, padding, peephole, pigeonhole, pinhole, placket, placket hole, porthole, punch-hole, spiracle, stopping, stuffing, tampon, tap, vent, venthole, wadding | ![]() |