1. (n.) A small hole or perforation to receive a cord or fastener, as in garments, sails, etc.

2. (n.) A metal ring or grommet, or short metallic tube, the ends of which can be bent outward and over to fasten it in place; -- used to line an eyelet hole.

air hole annulet armhole blowhole bullet-hole bunghole circlet cringle deadeye eye gasket grommet guide keyhole knothole loop loophole manhole mousehole peephole pigeonhole pinhole placket placket hole porthole punch-hole ringlet roundlet spiracle tap vent venthole